/* ShowForAi 官网样式 */
:root {
  --bg: #0b0e14;
  --bg-soft: #11151f;
  --card: #161b28;
  --card-border: #232a3b;
  --text: #e8ecf4;
  --text-dim: #9aa4b8;
  --brand: #4f7cff;
  --brand-2: #8b5cf6;
  --accent: #22d3ee;
  --ok: #34d399;
  --warn: #fbbf24;
  --radius: 14px;
  --maxw: 1080px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
    "PingFang SC", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

a { color: var(--brand); text-decoration: none; }
a:hover { opacity: 0.85; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* 顶栏 */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 14, 20, 0.96);
  border-bottom: 1px solid var(--card-border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--text); }
.logo svg { width: 28px; height: 28px; }
.nav-links { display: flex; gap: 28px; font-size: 15px; }
.nav-links a { color: var(--text-dim); }
.nav-links a:hover { color: var(--text); opacity: 1; }
.nav-cta {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff !important; padding: 8px 18px; border-radius: 999px; font-size: 14px;
}

/* Hero */
.hero {
  position: relative; overflow: hidden;
  padding: 96px 0 80px;
  background:
    radial-gradient(800px 400px at 70% -10%, rgba(79, 124, 255, 0.18), transparent 60%),
    radial-gradient(600px 300px at 20% 0%, rgba(139, 92, 246, 0.14), transparent 60%);
  text-align: center;
}
.badge {
  display: inline-block; font-size: 13px; color: var(--accent);
  border: 1px solid rgba(34, 211, 238, 0.35); border-radius: 999px;
  padding: 4px 14px; margin-bottom: 22px; background: rgba(34, 211, 238, 0.06);
}
.hero h1 { font-size: 46px; line-height: 1.25; font-weight: 800; letter-spacing: 0.5px; }
.hero h1 .grad {
  background: linear-gradient(90deg, var(--brand), var(--brand-2), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.sub {
  margin: 22px auto 0; max-width: 640px; font-size: 18px; color: var(--text-dim);
}
.hero-actions { margin-top: 38px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 30px; border-radius: 10px; font-size: 16px; font-weight: 600;
  transition: transform 0.15s ease;
}
.btn:hover { transform: translateY(-2px); opacity: 1; }
.btn-primary { background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff; }
.btn-ghost { border: 1px solid var(--card-border); color: var(--text); background: var(--card); }
.hero-note { margin-top: 14px; font-size: 13px; color: var(--text-dim); }

/* 区块 */
section { padding: 72px 0; }
section.alt { background: var(--bg-soft); }
.section-head { text-align: center; margin-bottom: 48px; }
.section-head h2 { font-size: 30px; font-weight: 700; }
.section-head p { margin-top: 10px; color: var(--text-dim); font-size: 16px; }

/* 特性卡片 */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 26px 24px;
}
.card .icon { font-size: 26px; margin-bottom: 14px; }
.card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.card p { font-size: 14px; color: var(--text-dim); }

/* 步骤 */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.step {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 24px 20px; position: relative;
}
.step::before {
  counter-increment: step; content: counter(step);
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  font-weight: 700; font-size: 15px; margin-bottom: 12px;
}
.step h3 { font-size: 16px; margin-bottom: 6px; }
.step p { font-size: 13.5px; color: var(--text-dim); }

/* 下载 */
.download-box {
  max-width: 620px; margin: 0 auto; text-align: center;
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 44px 36px;
}
.download-box h2 { font-size: 26px; margin-bottom: 12px; }
.download-box p { color: var(--text-dim); font-size: 15px; }
.download-box .btn { margin-top: 24px; }
.prerelease-tag {
  display: inline-block; margin-top: 18px; font-size: 13px; color: var(--warn);
  border: 1px solid rgba(251, 191, 36, 0.35); background: rgba(251, 191, 36, 0.07);
  border-radius: 8px; padding: 8px 14px;
}
.sysreq { margin-top: 18px; font-size: 13px; color: var(--text-dim); }

/* FAQ */
.faq { max-width: 760px; margin: 0 auto; }
.faq details {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: 10px; padding: 16px 20px; margin-bottom: 12px;
}
.faq summary { cursor: pointer; font-weight: 600; font-size: 15.5px; }
.faq details p { margin-top: 10px; font-size: 14px; color: var(--text-dim); }

/* 页脚 */
footer {
  border-top: 1px solid var(--card-border);
  padding: 36px 0; font-size: 13.5px; color: var(--text-dim);
}
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: var(--text-dim); }
.footer-links a:hover { color: var(--text); }

/* 法务文档页 */
.doc { max-width: 800px; margin: 0 auto; padding: 56px 24px 80px; }
.doc h1 { font-size: 28px; margin-bottom: 6px; }
.doc .doc-meta { color: var(--text-dim); font-size: 13.5px; margin-bottom: 36px; }
.doc h2 { font-size: 20px; margin: 34px 0 12px; }
.doc h3 { font-size: 16.5px; margin: 22px 0 8px; }
.doc p, .doc li { font-size: 15px; color: #c6cdda; }
.doc ul { padding-left: 22px; margin: 8px 0; }
.doc table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 14px; }
.doc th, .doc td { border: 1px solid var(--card-border); padding: 8px 12px; text-align: left; }
.doc th { background: var(--card); }
.doc .note {
  margin-top: 40px; padding: 14px 18px; border-left: 3px solid var(--warn);
  background: rgba(251, 191, 36, 0.06); font-size: 13.5px; color: var(--text-dim);
  border-radius: 0 8px 8px 0;
}
.doc .backlink { display: inline-block; margin-bottom: 28px; font-size: 14px; }

@media (max-width: 860px) {
  .hero h1 { font-size: 32px; }
  .grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
}