:root {
  --bg: #0a0f1e;
  --panel: #111831;
  --panel-2: #0d1428;
  --line: #223055;
  --text: #e8edf8;
  --muted: #93a0bd;
  --accent: #3d7bff;
  --accent-2: #6aa1ff;
  --green: #31c48d;
  --red: #f05252;
  --radius: 14px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: radial-gradient(1200px 600px at 20% -10%, #16224a 0%, var(--bg) 55%) fixed;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.nav { border-bottom: 1px solid var(--line); background: rgba(10,15,30,.85); backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 10; }
.nav-inner { max-width: 1080px; margin: 0 auto; padding: 14px 20px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; letter-spacing: .3px; }
.brand:hover { text-decoration: none; }
.spark { color: var(--accent); }
.nav nav { display: flex; align-items: center; gap: 18px; }
.nav nav a { color: var(--muted); font-size: 14px; }
.nav nav a:hover { color: var(--text); text-decoration: none; }
.inline { display: inline; margin: 0; }
.linklike { background: none; border: 0; color: var(--muted); font-size: 14px; cursor: pointer; padding: 0; }
.linklike:hover { color: var(--text); }

.container { max-width: 1080px; margin: 0 auto; padding: 36px 20px 64px; width: 100%; flex: 1; }
.foot { border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; text-align: center; padding: 22px; }

h1 { font-size: 30px; margin: 0 0 12px; letter-spacing: .2px; }
h2 { font-size: 20px; margin: 32px 0 14px; }
p { color: var(--muted); line-height: 1.7; }

.flash { max-width: 1040px; margin: 18px auto 0; padding: 12px 16px; border: 1px solid #2c4a86; background: #12224a; color: #cfe0ff; border-radius: 10px; font-size: 14px; }

.hero { padding: 30px 0 10px; }
.hero h1 { font-size: 42px; line-height: 1.15; margin-bottom: 16px; }
.hero .lead { font-size: 17px; max-width: 720px; }
.hero .cta { margin-top: 28px; display: flex; gap: 14px; flex-wrap: wrap; }

.btn { display: inline-block; padding: 11px 20px; border-radius: 10px; background: var(--accent); color: #fff; font-weight: 600; font-size: 14px; border: 1px solid var(--accent); cursor: pointer; }
.btn:hover { background: #2f6bff; text-decoration: none; }
.btn.sm { padding: 7px 14px; font-size: 13px; }
.btn.ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--accent); }
.btn.danger { background: transparent; border-color: #5a2a35; color: #ff9aa6; }
.btn.danger:hover { background: #2a1620; }

.grid { display: grid; gap: 18px; }
.grid.c3 { grid-template-columns: repeat(3, 1fr); }
.grid.c2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 820px) { .grid.c3, .grid.c2 { grid-template-columns: 1fr; } .hero h1 { font-size: 32px; } }

.card { background: linear-gradient(165deg, var(--panel), var(--panel-2)); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card h3 { margin: 0 0 8px; font-size: 16px; }
.card p { margin: 0; font-size: 14px; }
.card .icon { font-size: 22px; margin-bottom: 10px; display: block; }

.stat { display: flex; flex-direction: column; gap: 6px; }
.stat .label { color: var(--muted); font-size: 13px; }
.stat .value { font-size: 30px; font-weight: 700; letter-spacing: .3px; }
.stat .value small { font-size: 14px; color: var(--muted); font-weight: 400; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 500; font-size: 13px; }
tr:hover td { background: rgba(61,123,255,.05); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; border: 1px solid var(--line); color: var(--muted); }
.tag.green { color: #7ee2b8; border-color: #1e5c45; background: #0e2a20; }
.tag.red { color: #ff9aa6; border-color: #5a2a35; background: #2a1620; }

form.field { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
label { font-size: 13px; color: var(--muted); }
input[type=text], input[type=email], input[type=password], input[type=number] {
  width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--line);
  background: #0a1122; color: var(--text); font-size: 14px; outline: none;
}
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(61,123,255,.15); }

.auth { max-width: 420px; margin: 20px auto; }
.auth .card { padding: 30px; }
.auth h1 { font-size: 24px; text-align: center; }
.auth .sub { text-align: center; margin-top: 0; margin-bottom: 24px; font-size: 14px; }
.auth .switch { text-align: center; margin-top: 16px; font-size: 13px; color: var(--muted); }

.keybox { display: flex; gap: 10px; margin-top: 12px; }
.keybox input { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.codeblock { position: relative; background: #060b18; border: 1px solid var(--line); border-radius: 10px; padding: 16px; overflow-x: auto; margin: 14px 0; }
.codeblock pre { margin: 0; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; line-height: 1.6; color: #cfe0ff; }
.codeblock .copy { position: absolute; top: 10px; right: 10px; background: #16203c; border: 1px solid var(--line); color: var(--muted); border-radius: 7px; padding: 4px 10px; font-size: 12px; cursor: pointer; }
.codeblock .copy:hover { color: var(--text); border-color: var(--accent); }

.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.right { text-align: right; }
.nowrap { white-space: nowrap; }
hr { border: 0; border-top: 1px solid var(--line); margin: 26px 0; }