:root {
  --bg: #f7f8fc;
  --card: #ffffff;
  --text: #20253a;
  --muted: #65708a;
  --primary: #6c5ce7;
  --primary-soft: #ece9ff;
  --accent: #ff6b81;
  --line: #e8ebf4;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.topbar {
  background: #ffffff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 30;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
}

.logo {
  font-weight: 700;
  font-size: 20px;
  color: var(--text);
}

.logo span {
  color: var(--accent);
}

.nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.nav a {
  padding: 6px 10px;
  border-radius: 8px;
  color: var(--muted);
}

.nav a.active,
.nav a:hover {
  background: var(--primary-soft);
  color: var(--primary);
  text-decoration: none;
}

.hero {
  margin-top: 18px;
  background: linear-gradient(135deg, #f1efff 0%, #ffeef2 100%);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
}

.hero h1 {
  margin: 0 0 12px;
  line-height: 1.35;
}

.hero p {
  margin: 8px 0;
  color: #37405c;
}

.chip-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.chip {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 14px;
}

.grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.card img {
  display: block;
  width: 100%;
  height: 170px;
  object-fit: cover;
  background: #e9edff;
}

.card-body {
  padding: 14px;
}

.card h3 {
  margin: 0 0 8px;
  line-height: 1.45;
  font-size: 18px;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.section-title {
  margin: 30px 0 10px;
  font-size: 24px;
}

.article {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px;
  margin-top: 20px;
}

.article h2,
.article h3 {
  line-height: 1.45;
}

.article p {
  margin: 12px 0;
  color: #313b59;
}

.list {
  margin: 10px 0 0;
  padding-left: 20px;
}

.list li {
  margin: 8px 0;
}

.foot {
  margin-top: 30px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  padding: 18px 0 30px;
  font-size: 14px;
}

.meta {
  display: inline-block;
  margin-top: 8px;
  font-size: 12px;
  color: #7b86a3;
}

@media (max-width: 900px) {
  .grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .topbar-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    padding: 20px;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .card img {
    height: 190px;
  }
}