/* 基础主题 */
:root{
  --bg:#0b1020; /* 深蓝背景 */
  --card:#0f172a; /* slate-900 */
  --muted:#94a3b8; /* slate-400 */
  --fg:#e6edf3; /* 近白 */
  --pri:#7c3aed; /* 紫 */
  --pri-2:#22d3ee; /* 青 */
  --accent:#f59e0b; /* 金 */
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font:16px/1.6 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial; color:var(--fg); background:radial-gradient(1000px 600px at 10% -10%,rgba(124,58,237,.25),transparent),radial-gradient(1000px 600px at 90% 10%,rgba(34,211,238,.18),transparent),var(--bg)}
a{color:inherit;text-decoration:none}
.container{max-width:1100px;margin:0 auto;padding:24px}

/* 顶部英雄区 */
.hero{position:relative;border-radius:20px;overflow:hidden;padding:48px;background:linear-gradient(135deg,rgba(124,58,237,.18),rgba(34,211,238,.18));border:1px solid rgba(148,163,184,.2)}
.hero h1{margin:0 0 8px;font-size:38px;letter-spacing:.3px}
.hero p{margin:0;color:var(--muted)}
.hero .stat{display:flex;gap:18px;margin-top:20px}
.badge{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(15,23,42,.7);border:1px solid rgba(148,163,184,.16)}
.badge .dot{width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--pri),var(--pri-2))}

/* 三大板块按钮 */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:28px 0}
.card{position:relative;padding:22px;border-radius:16px;background:linear-gradient(180deg,rgba(15,23,42,.86),rgba(15,23,42,.72));border:1px solid rgba(148,163,184,.18);box-shadow:0 10px 30px rgba(2,8,23,.4);transition:transform .2s ease, box-shadow .2s ease}
.card:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(2,8,23,.55)}
.card h3{margin:6px 0 8px;font-size:20px}
.card p{margin:0;color:var(--muted)}
.chip{position:absolute;right:14px;top:14px;font-size:12px;color:#111;background:linear-gradient(135deg,#fde047,#f59e0b);padding:4px 8px;border-radius:999px}
.btn{display:inline-flex;align-items:center;gap:8px;margin-top:14px;padding:10px 14px;border-radius:10px;background:linear-gradient(135deg,var(--pri),var(--pri-2));color:#fff;font-weight:600}

/* 可视化区 */
.section{margin:40px 0}
.section h2{margin:0 0 12px}
.viz{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
.panel{background:rgba(2,6,23,.6);border:1px solid rgba(148,163,184,.16);border-radius:16px;padding:12px}
.panel .title{display:flex;align-items:center;justify-content:space-between;margin:4px 6px 10px;color:var(--muted)}
.panel .canvas{height:360px;border-radius:12px;overflow:hidden}

/* 页脚 */
footer{margin:36px 0 16px;color:var(--muted);text-align:center}

/* 响应式 */
@media (max-width:900px){
  .grid{grid-template-columns:1fr}
  .viz{grid-template-columns:1fr}
}