* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
}

body {
  font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
  background: #f7f5fb;
  color: #1f2937;
  line-height: 1.75;
}

a {
  color: #4c1d95;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #ffffff;
  border-bottom: 2px solid #4c1d95;
}

.header-inner {
  max-width: 680px;
  margin: 0 auto;
  padding: 0.65rem 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1rem;
}

.brand {
  font-size: 1.15rem;
  font-weight: 700;
  color: #4c1d95;
  margin-right: 0.35rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  flex: 1;
}

.nav a {
  color: #334155;
  font-size: 0.95rem;
}

.btn-download {
  display: inline-block;
  background: #4c1d95;
  color: #ffffff;
  padding: 0.35rem 0.85rem;
  font-size: 0.88rem;
  border: none;
  line-height: 1.4;
}

.btn-download:hover {
  text-decoration: none;
  opacity: 0.92;
  color: #ffffff;
}

.btn-download-lg {
  display: inline-block;
  background: #4c1d95;
  color: #ffffff;
  padding: 0.55rem 1.25rem;
  font-size: 1rem;
  margin: 0.75rem 0.5rem 0.75rem 0;
}

.btn-download-lg:hover {
  text-decoration: none;
  opacity: 0.92;
  color: #ffffff;
}

.wrap {
  max-width: 680px;
  margin: 0 auto;
  padding: 1.25rem 1rem 2.5rem;
}

.hero {
  margin-bottom: 1.75rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid #e5e7eb;
}

.hero h1 {
  font-size: 1.45rem;
  line-height: 1.45;
  color: #111827;
  margin-bottom: 0.85rem;
  font-weight: 700;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 0.5rem;
  font-size: 0.95rem;
}

.meta-date {
  color: #0f766e;
  font-size: 0.88rem;
  margin-bottom: 0.75rem;
}

section {
  margin-bottom: 1.85rem;
}

h2 {
  font-size: 1.18rem;
  color: #1e1b4b;
  font-weight: 700;
  padding-bottom: 0.35rem;
  margin-bottom: 0.95rem;
  border-bottom: 1px solid #4c1d95;
}

p {
  margin-bottom: 0.95rem;
  text-align: justify;
}

.ext-links {
  margin: 1rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
}

.ext-links a {
  color: #4c1d95;
}

.news-block ul {
  list-style: none;
}

.news-block li {
  margin-bottom: 1.1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid #e8e4ef;
}

.news-block .news-title {
  font-weight: 600;
  color: #1e1b4b;
  margin-bottom: 0.35rem;
}

.news-block .news-date {
  color: #0f766e;
  font-size: 0.86rem;
  margin-bottom: 0.35rem;
}

.news-block .news-summary {
  font-size: 0.95rem;
  color: #374151;
}

.faq-block details {
  margin-bottom: 0.75rem;
  border-bottom: 1px solid #e8e4ef;
  padding-bottom: 0.65rem;
}

.faq-block summary {
  cursor: pointer;
  font-weight: 600;
  color: #1e1b4b;
  list-style: none;
  padding: 0.35rem 0;
}

.faq-block summary::-webkit-details-marker {
  display: none;
}

.faq-block summary::before {
  content: "+ ";
  color: #4c1d95;
  font-weight: 700;
}

.faq-block details[open] summary::before {
  content: "- ";
}

.faq-block details p {
  margin-top: 0.5rem;
  color: #374151;
  font-size: 0.95rem;
}

.to-download {
  margin-top: 0.85rem;
}

.site-footer {
  max-width: 680px;
  margin: 0 auto;
  padding: 1.25rem 1rem 2rem;
  border-top: 1px solid #4c1d95;
  font-size: 0.86rem;
  color: #4b5563;
  line-height: 1.7;
}

.site-footer p {
  margin-bottom: 0.5rem;
  text-align: left;
}

@media (max-width: 640px) {
  .header-inner {
    padding: 0.55rem 0.85rem;
  }

  .hero h1 {
    font-size: 1.25rem;
  }

  .wrap {
    padding: 1rem 0.85rem 2rem;
  }
}