/* 刚刚好·无限回调授权系统 — 前台样式 */
:root {
  --bg0: #07151c;
  --bg1: #0c2430;
  --bg2: #123447;
  --card: rgba(255,255,255,.06);
  --card-border: rgba(125,211,252,.18);
  --text: #e8f6fb;
  --muted: #9fb8c4;
  --accent: #2dd4bf;
  --accent2: #38bdf8;
  --danger: #fb7185;
  --ok: #34d399;
  --warn: #fbbf24;
  --radius: 16px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --display: "Trebuchet MS", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--font);
  color: var(--text);
  background: linear-gradient(165deg, var(--bg0), var(--bg1) 50%, #0a1f28 100%);
}
a { color: var(--accent2); text-decoration: none; }
a:hover { color: #7dd3fc; }
.wrap { width: min(1080px, 92vw); margin: 0 auto; }
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 0 8px; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 12px; color: var(--text); }
.brand img { width: 42px; height: 42px; border-radius: 10px; object-fit: cover; background: #fff; }
.brand h1 { margin: 0; font: 700 1.15rem/1.2 var(--display); letter-spacing: .02em; }
.brand small { display: block; color: var(--muted); font-weight: 400; font-size: .75rem; margin-top: 2px; }
.nav-links { display: flex; flex-wrap: wrap; gap: 8px; }
.nav-links a {
  color: var(--muted); padding: 8px 12px; border-radius: 999px;
  border: 1px solid transparent; transition: .2s;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--text); border-color: var(--card-border); background: var(--card);
}
.hero {
  padding: 36px 0 18px;
}
.hero h2 {
  margin: 0 0 10px; font: 700 clamp(1.6rem, 3.5vw, 2.4rem)/1.25 var(--display);
  color: #ecfeff;
}
.hero p { margin: 0; color: var(--muted); max-width: 42rem; line-height: 1.7; }
.panel {
  margin: 22px 0 40px; padding: 28px;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
}
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
@media (max-width: 760px) { .grid-2 { grid-template-columns: 1fr; } .nav { flex-direction: column; align-items: flex-start; } }
label { display: block; font-size: .85rem; color: var(--muted); margin-bottom: 6px; }
input, select, textarea {
  width: 100%; padding: 12px 14px; border-radius: 12px;
  border: 1px solid rgba(125,211,252,.22);
  background: rgba(7,21,28,.55); color: var(--text); outline: none;
  transition: border-color .2s, box-shadow .2s;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px rgba(45,212,191,.18);
}
.pay-row { display: flex; flex-wrap: wrap; gap: 10px; }
.pay-opt {
  display: flex; align-items: center; gap: 8px; padding: 10px 14px;
  border-radius: 12px; border: 1px solid rgba(125,211,252,.2);
  background: rgba(0,0,0,.2); cursor: pointer; color: var(--muted);
}
.pay-opt input { width: auto; }
.pay-opt img { height: 22px; }
.pay-opt.active, .pay-opt:has(input:checked) {
  border-color: var(--accent); color: var(--text); background: rgba(45,212,191,.1);
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border: 0; border-radius: 12px; cursor: pointer;
  font-weight: 600; color: #042f2e;
  background: linear-gradient(135deg, #5eead4, #38bdf8);
}
.btn:hover { filter: brightness(1.05); }
.btn-ghost {
  background: transparent; color: var(--text);
  border: 1px solid var(--card-border); box-shadow: none;
}
.btn-block { width: 100%; }
.footer {
  padding: 28px 0 40px; color: var(--muted); font-size: .85rem; text-align: center;
  border-top: 1px solid rgba(255,255,255,.06);
}
.alert {
  padding: 12px 14px; border-radius: 12px; margin-bottom: 14px;
  background: rgba(56,189,248,.12); border: 1px solid rgba(56,189,248,.25); color: #bae6fd;
}
.alert.err { background: rgba(251,113,133,.12); border-color: rgba(251,113,133,.3); color: #fecdd3; }
.alert.ok { background: rgba(52,211,153,.12); border-color: rgba(52,211,153,.3); color: #a7f3d0; }
.mono { font-family: ui-monospace, Consolas, monospace; word-break: break-all; }
.copy-row { display: flex; gap: 8px; align-items: center; }
.copy-row input { flex: 1; }
.qrbox { text-align: center; padding: 16px; }
.qrbox img { width: 220px; height: 220px; background: #fff; border-radius: 12px; padding: 10px; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 22px; }
@media (max-width: 760px) { .features { grid-template-columns: 1fr; } }
.feat {
  padding: 16px; border-radius: 14px; border: 1px solid var(--card-border); background: var(--card);
}
.feat strong { display: block; margin-bottom: 6px; color: #99f6e4; }
.feat span { color: var(--muted); font-size: .9rem; line-height: 1.5; }