:root {
  --bg: #f7f9ff;
  --surface: #ffffff;
  --surface-soft: #f0f4ff;
  --text: #1f2a44;
  --muted: #5f6c86;
  --primary: #4062ff;
  --primary-strong: #2e4de2;
  --border: #dce4ff;
  --ok: #1dbf73;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 10% 0%, #eef3ff 0%, var(--bg) 40%, #ffffff 100%);
}

a { color: inherit; }

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 9;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--border);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 68px;
}

.brand {
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--primary);
}

.nav {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.nav a {
  text-decoration: none;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  font-size: 0.92rem;
  color: var(--muted);
}

.nav a.active,
.nav a:hover {
  background: var(--surface-soft);
  color: var(--primary-strong);
}

.hero {
  padding: 3.5rem 0 1.6rem;
}

.badge {
  display: inline-block;
  margin: 0;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  background: #e9efff;
  color: var(--primary-strong);
  font-size: 0.88rem;
}

h1 {
  margin: 1rem 0 0.6rem;
  font-size: clamp(1.9rem, 4.4vw, 3.2rem);
  line-height: 1.2;
}

.lead {
  max-width: 46rem;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.8;
}

.cta-row {
  margin-top: 1.4rem;
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  text-decoration: none;
  border: 1px solid var(--primary);
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  font-weight: 600;
  padding: 0.72rem 1.1rem;
}

.btn:hover { background: var(--primary-strong); border-color: var(--primary-strong); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-light {
  background: #fff;
  color: var(--primary-strong);
  border-color: #b7c7ff;
}

.page-main { padding-bottom: 2.8rem; }

.section { margin: 2rem 0; }

h2 {
  font-size: clamp(1.25rem, 3vw, 2rem);
  margin: 0 0 1rem;
}

h3 { margin-top: 0; }

p { line-height: 1.8; }

.grid-3 {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.1rem;
  box-shadow: 0 8px 22px rgba(34, 78, 190, 0.07);
}

.card p { color: var(--muted); }

.accent {
  background: linear-gradient(130deg, #ffffff 0%, #f2f6ff 100%);
}

.split {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1rem;
}

.list-links {
  margin: 0;
  padding-left: 1.1rem;
}

.list-links li { margin-bottom: 0.6rem; }
.list-links a { color: var(--primary-strong); text-decoration: none; }
.list-links a:hover { text-decoration: underline; }

.page-head { margin-top: 2rem; }
.page-head p { color: var(--muted); }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem;
  margin: 1rem 0;
}

form {
  display: grid;
  gap: 0.7rem;
}

input, textarea, select {
  width: 100%;
  border: 1px solid #cad6ff;
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
  font: inherit;
  color: var(--text);
  background: #fff;
}

textarea { min-height: 120px; resize: vertical; }

.meta {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  color: #7a87a6;
  font-size: 0.9rem;
}

.news-item + .news-item { margin-top: 0.8rem; }
.news-cover {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 0.8rem;
  border: 1px solid var(--border);
  background: #f3f6ff;
}
.news-body { margin-top: 0.7rem; }
.news-subtitle {
  margin: 0.8rem 0 0.35rem;
  font-size: 1rem;
  color: #304ea8;
}
.news-paragraph {
  margin: 0.4rem 0;
  line-height: 1.85;
  color: var(--muted);
}

.download-list a {
  color: var(--primary-strong);
  text-decoration: none;
}
.download-list a:hover { text-decoration: underline; }

.tagline {
  display: inline-block;
  font-size: 0.85rem;
  color: #2a59d8;
  background: #eaf0ff;
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
}

.ok { color: var(--ok); font-size: 0.9rem; }
.hidden { display: none; }

.site-footer {
  border-top: 1px solid var(--border);
  background: #fff;
  margin-top: 2rem;
}

.foot-wrap {
  min-height: 68px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  color: #7683a3;
  font-size: 0.92rem;
  padding: 0.8rem 0;
}

.foot-wrap a { color: var(--primary); text-decoration: none; }
.foot-wrap a:hover { text-decoration: underline; }

@media (max-width: 780px) {
  .split { grid-template-columns: 1fr; }
}