/* 云闪礼簿官网共享样式 - 基于 index.html 设计体系 */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  color: #2d2d2d; line-height: 1.7; background: #fdfbf7; overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Nav */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(253, 251, 247, 0.92); backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid rgba(200, 16, 46, 0.08);
}
.nav .container { display: flex; align-items: center; justify-content: space-between; padding-top: 16px; padding-bottom: 16px; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 700; color: #C8102E; letter-spacing: 1px; }
.nav-logo img { height: 36px; width: auto; }
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a { font-size: 0.95rem; color: #555; transition: color 0.2s; }
.nav-links a:hover, .nav-links a.active { color: #C8102E; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 36px; border-radius: 50px; font-size: 1rem; font-weight: 600; cursor: pointer; border: none; transition: all 0.25s; }
.btn-primary { background: linear-gradient(135deg, #C8102E, #e63946); color: #fff; box-shadow: 0 6px 24px rgba(200, 16, 46, 0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 32px rgba(200, 16, 46, 0.4); }

/* Breadcrumb */
.breadcrumb { padding: 100px 0 0; font-size: 0.85rem; color: #999; }
.breadcrumb a { color: #C8102E; }

/* Article */
.article { padding: 24px 0 60px; }
.article-header { text-align: center; margin-bottom: 40px; }
.article-header h1 { font-size: 2.4rem; font-weight: 800; color: #2d2d2d; line-height: 1.3; margin-bottom: 16px; }
.article-header .lead { font-size: 1.1rem; color: #777; max-width: 680px; margin: 0 auto; }
.article-body { max-width: 820px; margin: 0 auto; }
.article-body h2 { font-size: 1.6rem; font-weight: 700; color: #C8102E; margin: 40px 0 16px; padding-bottom: 8px; border-bottom: 2px solid rgba(200,16,46,0.1); }
.article-body h3 { font-size: 1.25rem; font-weight: 700; color: #333; margin: 28px 0 12px; }
.article-body p { margin-bottom: 16px; color: #444; }
.article-body ul, .article-body ol { margin: 0 0 16px 24px; color: #444; }
.article-body li { margin-bottom: 8px; }
.article-body strong { color: #C8102E; }
.article-body .tip { background: rgba(200,16,46,0.05); border-left: 4px solid #C8102E; padding: 16px 20px; border-radius: 8px; margin: 20px 0; color: #555; }

/* CTA box */
.cta-box { text-align: center; padding: 48px 24px; background: linear-gradient(135deg, #C8102E, #a00d24); color: #fff; border-radius: 24px; margin: 48px auto; max-width: 820px; }
.cta-box h2 { font-size: 1.6rem; font-weight: 800; margin-bottom: 12px; }
.cta-box p { opacity: 0.9; margin-bottom: 24px; }
.cta-box .qrcode { width: 160px; height: 160px; background: #fff; border-radius: 16px; padding: 10px; margin: 0 auto 12px; }

/* Related links */
.related { max-width: 820px; margin: 40px auto; }
.related h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 16px; color: #333; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.related-card { background: #fff; border: 1px solid #f0ebe4; border-radius: 14px; padding: 20px; transition: all 0.25s; }
.related-card:hover { border-color: #C8102E; transform: translateY(-2px); }
.related-card h4 { font-size: 1rem; font-weight: 700; color: #C8102E; margin-bottom: 6px; }
.related-card p { font-size: 0.82rem; color: #888; }

/* Footer */
footer { margin-top: 60px; padding: 50px 0 30px; border-top: 1px solid #f0ebe4; text-align: center; color: #aaa; font-size: 0.85rem; }
footer p + p { margin-top: 6px; }
footer a { color: #C8102E; }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .article-header h1 { font-size: 1.8rem; }
}