:root {
  --bg: #f8fafc;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent: #2563eb;
  --success: #10b981;

  /* Footer 深灰色体系（保持不变） */
  --footer-bg: #21252e;
  --footer-text: #94a3b8;
  --footer-meta: #64748b;
  --footer-link: #cbd5e1;
  --footer-link-hover: #60a5fa;
  --footer-border: #2a303c;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI",
    "Microsoft YaHei", sans-serif;
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(37, 99, 235, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 50% 110%, rgba(59, 130, 246, 0.04), transparent);
  color: var(--text-primary);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

/* ---------- 全屏主体区域（无卡片、全屏展开） ---------- */
.fullscreen-main {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 24px;
  width: 100%;
}

.hero-content {
  max-width: 820px;
  width: 100%;
  margin: 0 auto;
}

.domain-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid #e2e8f0;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: #334155;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
  backdrop-filter: blur(8px);
  margin-bottom: 28px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
  animation: pulse 2.4s infinite ease-in-out;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(0.85);
    opacity: 0.6;
  }
}

.main-title {
  font-size: clamp(32px, 5.5vw, 52px);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
}

.main-title.brand-title {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 22px;
}

.brand-logo {
  height: 72px;
  max-width: 240px;
  width: auto;
  object-fit: contain;
  display: block;
}

.main-desc {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 640px;
  margin: 0 auto;
}

/* ---------- Footer（深灰色背景，保持不变） ---------- */
.site-footer {
  margin-top: auto;
  flex-shrink: 0;
  background: var(--footer-bg);
  color: var(--footer-text);
  border-top: 1px solid var(--footer-border);
  padding: 26px 24px;
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.beian {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
  font-size: 13px;
}

.beian a {
  color: var(--footer-link);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.15s ease;
}

.beian a:hover {
  color: var(--footer-link-hover);
  text-decoration: underline;
}

.beian .mps-icon {
  display: inline-block;
  width: 14px;
  height: auto;
  flex: none;
  vertical-align: middle;
}

.beian .no-record {
  color: var(--footer-text);
}

.footer-meta {
  margin-top: 10px;
  font-size: 12px;
  color: var(--footer-meta);
}

@media (max-width: 560px) {
  .fullscreen-main { padding: 40px 20px; }
  .domain-pill { margin-bottom: 20px; padding: 6px 14px; font-size: 13px; }
  .brand-logo { height: 56px; max-width: 190px; }
  .main-title.brand-title { margin-bottom: 18px; }
  .site-footer { padding: 20px 16px; }
  .beian { flex-direction: column; gap: 6px; align-items: center; }
}