/* 宣传首页样式 */
:root {
  --lp-bg: #0f1419;
  --lp-card: #1a2332;
  --lp-text: #e6edf3;
  --lp-muted: #8b949e;
  --lp-accent: #1a73e8;
  --lp-accent-hover: #2b7de9;
  --lp-border: #30363d;
}

* {
  box-sizing: border-box;
}

.landing {
  font-family: "Microsoft YaHei UI", "Segoe UI", -apple-system, sans-serif;
  background: var(--lp-bg);
  color: var(--lp-text);
  min-height: 100vh;
  margin: 0;
}

.landing a {
  color: var(--lp-accent);
  text-decoration: none;
}

.landing a:hover {
  color: var(--lp-accent-hover);
  text-decoration: underline;
}

/* 按钮为链接时强制白字，避免被上面链接样式覆盖 */
.landing a.lp-cta,
.landing a.lp-cta:hover {
  color: #ffffff !important;
  text-decoration: none !important;
}

/* Hero */
.lp-hero {
  text-align: center;
  padding: 80px 24px 60px;
  max-width: 720px;
  margin: 0 auto;
}

.lp-hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin: 0 0 16px 0;
  letter-spacing: -0.02em;
}

.lp-hero .tagline {
  font-size: 1.125rem;
  color: var(--lp-muted);
  margin: 0 0 32px 0;
  line-height: 1.6;
}

.lp-cta {
  display: inline-block;
  padding: 14px 32px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff !important;
  background: var(--lp-accent);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
  letter-spacing: 0.02em;
}

.lp-cta:hover {
  background: var(--lp-accent-hover);
  text-decoration: none !important;
  color: #ffffff !important;
}

/* Features */
.lp-section {
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 24px;
}

.lp-section h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 32px 0;
  text-align: center;
  color: var(--lp-text);
}

.lp-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.lp-feature {
  background: var(--lp-card);
  border: 1px solid var(--lp-border);
  border-radius: 12px;
  padding: 24px;
}

.lp-feature h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 8px 0;
}

.lp-feature p {
  font-size: 0.9rem;
  color: var(--lp-muted);
  margin: 0;
  line-height: 1.5;
}

/* Steps */
.lp-steps {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;
  margin-top: 24px;
}

.lp-step {
  flex: 1;
  min-width: 200px;
  max-width: 280px;
  text-align: center;
}

.lp-step-num {
  width: 40px;
  height: 40px;
  line-height: 40px;
  margin: 0 auto 16px auto;
  background: var(--lp-accent);
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
  font-size: 1.1rem;
}

.lp-step h3 {
  font-size: 1rem;
  margin: 0 0 8px 0;
}

.lp-step p {
  font-size: 0.875rem;
  color: var(--lp-muted);
  margin: 0;
  line-height: 1.5;
}

/* CTA 区 */
.lp-cta-block {
  text-align: center;
  padding: 48px 24px;
}

.lp-cta-block .lp-cta {
  margin-top: 8px;
}

/* Footer */
.lp-footer {
  text-align: center;
  padding: 32px 24px;
  border-top: 1px solid var(--lp-border);
  font-size: 0.875rem;
  color: var(--lp-muted);
}

.lp-footer a {
  margin: 0 6px;
}

.lp-footer .footer-emails {
  margin: 0 6px;
}

.lp-footer .footer-emails a {
  margin: 0;
}

.lp-footer .footer-sep {
  margin: 0;
  color: var(--lp-muted);
  user-select: none;
}