/* 跨境圣手官网样式 —— 清新自然 */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Microsoft YaHei", "Source Han Sans CN", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: #1f2937;
  background: #ffffff;
  -webkit-font-smoothing: antialiased;
}
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }
code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  background: #f3f4f6;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.92em;
}

/* —— Top bar —— */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 32px;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid #eef0f4;
}
.brand { display: flex; align-items: center; gap: 10px; color: #1f2937; font-weight: 600; font-size: 18px; }
.brand img { width: 28px; height: 28px; }
.brand:hover { text-decoration: none; }
.topbar nav { display: flex; gap: 24px; }
.topbar nav a { color: #4b5563; font-size: 15px; }
.topbar nav a:hover { color: #2563eb; text-decoration: none; }

/* —— Hero —— */
.hero {
  text-align: center;
  padding: 88px 24px 72px;
  background: linear-gradient(180deg, #f7fbff 0%, #ffffff 100%);
}
.hero-inner { max-width: 760px; margin: 0 auto; }
.badge {
  display: inline-block;
  padding: 6px 14px;
  background: #ecfdf5;
  color: #047857;
  border-radius: 999px;
  font-size: 13px;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: 56px;
  font-weight: 700;
  margin: 0 0 14px;
  letter-spacing: 1px;
  color: #0f172a;
}
.tagline { font-size: 22px; color: #334155; margin: 0 0 18px; font-weight: 500; }
.desc { color: #6b7280; font-size: 16px; max-width: 580px; margin: 0 auto 28px; }
.cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 14px; }
.btn-primary {
  background: #2563eb;
  color: #ffffff;
  padding: 12px 26px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  transition: background 0.15s ease, transform 0.15s ease;
}
.btn-primary:hover { background: #1d4ed8; text-decoration: none; transform: translateY(-1px); }
.btn-primary.big { padding: 14px 28px; font-size: 16px; }
.btn-ghost {
  background: #ffffff;
  color: #2563eb;
  padding: 12px 26px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid #d1d5db;
}
.btn-ghost:hover { border-color: #2563eb; text-decoration: none; }
.hint { color: #9ca3af; font-size: 13px; margin-top: 12px; }

/* —— Features —— */
section h2 {
  font-size: 30px;
  font-weight: 700;
  color: #0f172a;
  text-align: center;
  margin: 0 0 40px;
}
.features { padding: 80px 24px; background: #f8fafc; }
.grid {
  max-width: 1080px; margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.card {
  background: #ffffff;
  border: 1px solid #eef0f4;
  border-radius: 12px;
  padding: 28px 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.card:hover { border-color: #c7d2fe; transform: translateY(-2px); }
.ico {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: #eef2ff;
  color: #2563eb;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 700;
  margin-bottom: 14px;
}
.card h3 { margin: 0 0 8px; font-size: 17px; color: #1f2937; }
.card p { margin: 0; color: #6b7280; font-size: 14.5px; }

/* —— Download —— */
.download { padding: 80px 24px; }
.dl-card {
  max-width: 760px; margin: 0 auto;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  padding: 36px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}
.dl-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.dl-label { color: #6b7280; font-size: 13px; }
.dl-version { font-size: 30px; font-weight: 700; color: #0f172a; line-height: 1.2; margin-top: 4px; }
.dl-notes {
  margin: 22px 0 18px;
  padding: 14px 18px;
  background: #f8fafc;
  border-left: 3px solid #10b981;
  border-radius: 6px;
  color: #4b5563;
  font-size: 14.5px;
}
.dl-meta {
  display: flex; flex-wrap: wrap; gap: 20px;
  color: #6b7280; font-size: 13px;
  padding-top: 16px;
  border-top: 1px dashed #e5e7eb;
}
.dl-meta code { font-size: 11.5px; word-break: break-all; }
.dl-tip { color: #9ca3af; font-size: 13px; margin: 16px 0 0; line-height: 1.6; }

/* —— Changelog —— */
.changelog { padding: 80px 24px; background: #f8fafc; }
.cl-list { max-width: 760px; margin: 0 auto; }
.cl-item {
  background: #ffffff;
  border: 1px solid #eef0f4;
  border-radius: 12px;
  padding: 22px 26px;
  margin-bottom: 14px;
}
.cl-head { display: flex; align-items: baseline; gap: 16px; margin-bottom: 10px; flex-wrap: wrap; }
.cl-ver { font-size: 18px; font-weight: 700; color: #0f172a; }
.cl-date { color: #9ca3af; font-size: 13px; }
.cl-tag {
  background: #ecfdf5; color: #047857;
  padding: 2px 10px; border-radius: 999px; font-size: 12px;
}
.cl-list ul { margin: 0; padding-left: 22px; color: #4b5563; font-size: 14.5px; }
.cl-list li { margin: 4px 0; }

/* —— Contact —— */
.contact { padding: 80px 24px; }
.contact-grid {
  max-width: 760px; margin: 0 auto;
  display: grid; grid-template-columns: 220px 1fr; gap: 40px; align-items: center;
}
.qr-card {
  background: #ffffff;
  border: 1px solid #eef0f4;
  border-radius: 14px;
  padding: 16px;
  text-align: center;
}
.qr-card img {
  width: 188px; height: 188px;
  display: block; margin: 0 auto;
  border-radius: 8px;
  object-fit: cover;
}
.qr-placeholder {
  width: 188px; height: 188px;
  margin: 0 auto;
  border: 2px dashed #d1d5db;
  border-radius: 8px;
  display: none;
  flex-direction: column;
  align-items: center; justify-content: center;
  color: #9ca3af;
  gap: 6px;
}
.qr-placeholder small { font-size: 11px; }
.qr-card p { margin: 12px 0 0; font-size: 13px; color: #6b7280; }
.contact-text p { margin: 0 0 12px; color: #4b5563; }
.contact-text .note { color: #9ca3af; font-size: 13px; }

@media (max-width: 640px) {
  .contact-grid { grid-template-columns: 1fr; text-align: center; }
  .hero h1 { font-size: 40px; }
  .hero { padding: 64px 20px 56px; }
  section h2 { font-size: 24px; margin-bottom: 28px; }
  .features, .download, .changelog, .contact { padding: 56px 20px; }
  .dl-card { padding: 24px; }
  .topbar { padding: 12px 18px; }
  .topbar nav { gap: 14px; font-size: 14px; }
}

/* —— Footer —— */
footer { padding: 28px 24px; background: #0f172a; color: #94a3b8; font-size: 13px; }
.foot-inner { max-width: 1080px; margin: 0 auto; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.foot-links { display: flex; gap: 18px; }
.foot-links a { color: #cbd5e1; }
.foot-links a:hover { color: #ffffff; }