:root {
  --bg: #f5f8f5;
  --card: #ffffff;
  --text: #18202f;
  --muted: #667085;
  --primary: #00b548;
  --primary-dark: #00953b;
  --border: #e4e7ec;
  --warning-bg: #fff7e6;
  --warning-border: #ffd591;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  background: radial-gradient(circle at top, #e6f8ee 0%, var(--bg) 40%, #eff5f1 100%);
  color: var(--text);
  line-height: 1.7;
}

.page {
  width: min(960px, 92vw);
  margin: 0 auto;
  padding: 32px 0 48px;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 92px 28px 56px;
  text-align: center;
  border-radius: 28px;
  background: linear-gradient(135deg, #00953b, #00b548 56%, #28d36a);
  color: #fff;
  box-shadow: 0 24px 60px rgba(0, 181, 72, .24);
}

.brand-logo {
  position: absolute;
  top: 24px;
  left: 28px;
  display: block;
  width: min(180px, 36vw);
  margin: 0;
  background: transparent;
  box-shadow: none;
  border-radius: 0;
}

.badge {
  display: inline-flex;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.3);
  font-size: 14px;
  margin-bottom: 16px;
}

h1 {
  margin: 0;
  font-size: clamp(32px, 6vw, 54px);
  line-height: 1.18;
  letter-spacing: -1px;
}

.subtitle {
  width: min(680px, 100%);
  margin: 18px auto 0;
  color: rgba(255,255,255,.92);
  font-size: 17px;
}

.actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 170px;
  padding: 13px 22px;
  border-radius: 14px;
  text-decoration: none;
  font-weight: 700;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}

.btn:hover { transform: translateY(-1px); }
.btn.primary {
  color: var(--primary-dark);
  background: #fff;
  box-shadow: 0 12px 28px rgba(0,0,0,.16);
}
.btn.secondary {
  color: #fff;
  border: 1px solid rgba(255,255,255,.45);
  background: rgba(255,255,255,.12);
}
.btn.small {
  color: #fff;
  background: var(--primary);
  min-width: 128px;
  padding: 10px 16px;
  border-radius: 12px;
  box-shadow: 0 10px 22px rgba(0,181,72,.18);
  white-space: nowrap;
}
.btn.small:hover { background: var(--primary-dark); }

.card {
  margin-top: 22px;
  padding: 28px;
  border-radius: 22px;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: 0 12px 34px rgba(16,24,40,.06);
}

.card h2 {
  margin: 0 0 18px;
  font-size: 24px;
}

.section-note {
  margin: -8px 0 18px;
  color: var(--muted);
}

.download-list {
  display: grid;
  gap: 14px;
}

.download-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 18px;
}

.driver-info h3 {
  margin: 0 0 6px;
  font-size: 19px;
}
.driver-info p {
  margin: 3px 0;
  color: #344054;
}
.filename {
  font-size: 13px;
  color: var(--muted) !important;
  word-break: break-all;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.info-grid div, .support-box div {
  padding: 16px;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 16px;
}

.info-grid span, .support-box span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 6px;
}

.info-grid strong, .support-box strong {
  display: block;
  font-size: 16px;
}

.steps {
  margin: 0;
  padding-left: 22px;
}
.steps li { margin: 10px 0; }

.warning {
  background: var(--warning-bg);
  border-color: var(--warning-border);
}
.warning p, .support p { margin: 0; color: #344054; }
.support-box {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  padding: 26px 0 0;
}

@media (max-width: 720px) {
  .page { width: 94vw; padding-top: 18px; }
  .hero { padding: 82px 18px 42px; border-radius: 22px; }
  .brand-logo {
    top: 16px;
    left: 16px;
    width: min(140px, 42vw);
  }
  .card { padding: 22px 18px; }
  .info-grid, .support-box { grid-template-columns: 1fr; }
  .btn { width: 100%; }
  .download-card { align-items: stretch; flex-direction: column; }
  .btn.small { width: 100%; }
}