:root{
  --bg:#0b0f17; --card:#121826; --line:#1f2937; --fg:#e5e7eb;
  --dim:#8b93a7; --green:#4ade80; --link:#7dd3fc; --accent:#fbbf24;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);
  font:15px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:960px;margin:0 auto;padding:0 16px}

.topbar{position:sticky;top:0;z-index:10;background:rgba(11,15,23,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;align-items:center;gap:18px;height:56px}
.logo{font-weight:700;font-size:17px;color:var(--fg)}
.logo .dim{font-weight:400;color:var(--dim)}
.main-nav{display:flex;gap:4px;overflow-x:auto;flex:1}
.main-nav a{white-space:nowrap;padding:6px 12px;border-radius:8px;color:var(--dim);font-size:14px}
.main-nav a.active{color:var(--fg);background:#1c2637}

main{padding:24px 0 40px}
.hero{text-align:center;padding:28px 0 8px}
.hero h1{font-size:26px;margin:0 0 8px}
.hero p{color:var(--dim);max-width:640px;margin:0 auto 14px}
.stats{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;color:var(--dim);font-size:14px}
.stats b{color:var(--accent)}

.card{background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:20px 22px;margin:18px 0}
.card h2{margin:0 0 14px;font-size:18px}
.card h3{margin:18px 0 8px;font-size:16px}
.card small{color:var(--dim);font-weight:400;font-size:13px}

.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:10px 8px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{color:var(--dim);font-weight:500;font-size:13px}
.rank{color:var(--accent);font-weight:700;min-width:28px}
.term{font-weight:600}
.explain{color:var(--dim);font-size:13px;margin-top:3px;max-width:560px}
.tag{font-size:12px;background:#1c2637;border-radius:20px;padding:3px 10px;white-space:nowrap}
.src{color:var(--dim);font-size:11px}
.dim{color:var(--dim)}
.up{color:var(--green)}
.empty{color:var(--dim);padding:14px 0}

ul.tips,ul.list{padding-left:4px;list-style:none}
ul.tips li,ul.list li{padding:6px 0;border-bottom:1px dashed var(--line)}
ul.list.inline li{display:inline-block;margin-right:16px;border:none}
ul.list .rank{color:var(--accent);font-weight:700;margin-right:6px}

.chart{background:#0d1320;border-radius:10px;padding:10px;margin:8px 0}
.chart svg{width:100%;height:auto}
ul.history{columns:3;font-size:13px;padding-left:0;list-style:none}
ul.history li{break-inside:avoid;padding:2px 0}

.word-title{font-size:28px;margin:0 0 4px}
.explain-box{background:#0d1320;border-left:3px solid var(--green);border-radius:8px;
  padding:12px 16px;white-space:pre-wrap}
.cta{margin-top:18px;padding-top:14px;border-top:1px solid var(--line)}
.report h3{margin-top:20px}
.report a{word-break:break-all}

.footer{border-top:1px solid var(--line);padding:22px 0 30px;color:var(--dim);font-size:13px;text-align:center}
.footer .friend{margin-bottom:10px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

@media(max-width:640px){
  .hero h1{font-size:21px}
  .card{padding:16px}
  ul.history{columns:2}
  th:nth-child(4),td:nth-child(4){display:none}
}