:root {
  --bg: #f3f4f6;
  --surface: #ffffff;
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.08);
  --accent-strong: #1d4ed8;
  --text-main: #111827;
  --text-muted: #6b7280;
  --border: rgba(148, 163, 184, 0.4);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: linear-gradient(180deg, #e5edff 0, #f3f4f6 35%, #f3f4f6 100%);
  color: var(--text-main);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  padding: 14px 18px 10px;
}

.header-inner {
  max-width: 1040px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.avatar {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background:
    radial-gradient(circle at 12% 0, #ffffff 0, #bfdbfe 22%, #2563eb 65%, #1e293b 100%);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-name {
  font-weight: 700;
  font-size: 16px;
}

.brand-sub {
  font-size: 11px;
  color: var(--text-muted);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 12px;
}

.nav a {
  padding: 4px 8px;
  border-radius: 999px;
  color: var(--text-muted);
}

.nav a:hover {
  background-color: var(--accent-soft);
  color: var(--accent-strong);
}

.nav a.active {
  background-color: var(--accent);
  color: #eff6ff;
}

.main {
  flex: 1;
  max-width: 1040px;
  margin: 0 auto;
  padding: 10px 18px 28px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) 260px;
  gap: 18px;
  align-items: center;
  margin-bottom: 18px;
}

.hero-text h1 {
  font-size: 24px;
  margin: 0 0 8px;
}

.hero-text p {
  margin: 0 0 8px;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
}

.hero-actions {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 12px;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--accent);
  color: #eff6ff;
}

.btn-outline {
  background-color: transparent;
  border-color: rgba(148, 163, 184, 0.7);
  color: var(--text-main);
}

.hero-media {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background-color: #020617;
}

.hero-media img {
  width: 100%;
  height: 190px;
  object-fit: cover;
}

.section-title {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent-strong);
  margin: 10px 0 6px;
}

.columns {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.1fr);
  gap: 16px;
}

.card {
  background-color: var(--surface);
  border-radius: 14px;
  border: 1px solid var(--border);
  padding: 12px 13px 14px;
}

.card h2 {
  font-size: 15px;
  margin: 0 0 6px;
}

.card p,
.card li {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0 0 6px;
  line-height: 1.8;
}

.card ul {
  margin: 0;
  padding-left: 16px;
}

.tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.tag-pill {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 999px;
  background-color: var(--accent-soft);
  color: var(--accent-strong);
}

.footer-note {
  margin-top: 16px;
  font-size: 11px;
  color: var(--text-muted);
}

@media (max-width: 880px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
  }

  .columns {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 700px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .main {
    padding-inline: 14px;
  }
}