:root {
  --bg: #0f1115;
  --card: #1a1d24;
  --card-2: #20242d;
  --line: #2a2f3a;
  --text: #e8eaed;
  --muted: #8b93a1;
  --primary: #4f8cff;
  --primary-2: #3a6fd8;
  --green: #34d399;
  --amber: #fbbf24;
  --red: #f87171;
  --radius: 14px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1c2433 0%, var(--bg) 60%);
  color: var(--text);
  min-height: 100vh;
  padding: 24px 16px;
}
#app { max-width: 520px; margin: 0 auto; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.tiny { font-size: 12px; }
.row { display: flex; align-items: center; }
.between { justify-content: space-between; }
.gap { gap: 10px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 18px;
  margin-bottom: 16px;
}
h1 { font-size: 22px; }
h2 { font-size: 16px; font-weight: 600; margin-bottom: 4px; }

/* 按钮 */
.btn {
  background: var(--card-2); color: var(--text);
  border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 14px; font-size: 14px; cursor: pointer;
  transition: .15s; font-weight: 500;
}
.btn:hover { border-color: var(--primary); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; width: 100%; }
.btn.primary:hover { background: var(--primary-2); }
.btn.ghost { background: transparent; }
.btn.sm { padding: 6px 12px; font-size: 13px; }

/* 登录卡片 */
.auth-card { margin-top: 6vh; }
.brand { text-align: center; margin-bottom: 18px; }
.logo { font-size: 40px; }
.brand .muted { margin-top: 2px; }
.tabs { display: flex; gap: 8px; background: var(--card-2); padding: 4px; border-radius: 10px; margin-bottom: 16px; }
.tab { flex: 1; background: transparent; border: 0; color: var(--muted); padding: 8px; border-radius: 7px; cursor: pointer; font-size: 14px; }
.tab.active { background: var(--primary); color: #fff; }
form label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 12px; }
form input {
  display: block; width: 100%; margin-top: 6px;
  background: var(--card-2); border: 1px solid var(--line);
  border-radius: 9px; padding: 11px 12px; color: var(--text); font-size: 14px;
}
form input:focus { outline: none; border-color: var(--primary); }
.error { color: var(--red); font-size: 13px; margin-top: 8px; min-height: 18px; }

/* 顶栏 */
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; padding: 0 4px; }
.brand-sm { font-weight: 600; }
.logo-sm { color: var(--primary); }
.account { display: flex; align-items: center; gap: 10px; }

/* 订阅 */
.badge { font-size: 12px; padding: 4px 10px; border-radius: 999px; background: var(--card-2); border: 1px solid var(--line); }
.badge.active { background: rgba(52,211,153,.15); color: var(--green); border-color: transparent; }
.badge.inactive { background: rgba(248,113,113,.15); color: var(--red); border-color: transparent; }
.sub-detail { margin: 8px 0 12px; font-size: 14px; }
.meter { height: 8px; background: var(--card-2); border-radius: 999px; overflow: hidden; }
.meter-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--green), var(--primary)); transition: width .4s; }
.sub-meta { margin: 8px 0 14px; font-size: 13px; }

/* 导入 */
.import-box { display: flex; gap: 8px; margin: 12px 0 10px; }
.import-box input { flex: 1; background: var(--card-2); border: 1px solid var(--line); border-radius: 9px; padding: 10px 12px; color: var(--muted); font-size: 13px; font-family: monospace; }

/* 节点列表 */
.node-list { list-style: none; margin-top: 10px; }
.node-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px; border: 1px solid var(--line); border-radius: 11px;
  margin-bottom: 8px; cursor: pointer; transition: .15s;
}
.node-item:hover { border-color: var(--primary); }
.node-item.selected { border-color: var(--primary); background: rgba(79,140,255,.08); }
.node-left { display: flex; align-items: center; gap: 12px; }
.node-radio { width: 16px; height: 16px; border-radius: 50%; border: 2px solid var(--line); flex: none; }
.node-item.selected .node-radio { border-color: var(--primary); background: var(--primary); box-shadow: inset 0 0 0 3px var(--card); }
.node-name { font-size: 14px; font-weight: 500; }
.node-sub { font-size: 12px; color: var(--muted); }
.latency { font-size: 13px; font-weight: 600; font-variant-numeric: tabular-nums; }
.lat-good { color: var(--green); }
.lat-mid { color: var(--amber); }
.lat-bad { color: var(--red); }

/* 套餐弹窗 */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,.6); display: flex; align-items: center; justify-content: center; padding: 16px; z-index: 50; }
.modal-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; width: 100%; max-width: 440px; }
.plan-list { display: flex; flex-direction: column; gap: 10px; margin: 14px 0; }
.plan { display: flex; justify-content: space-between; align-items: center; border: 1px solid var(--line); border-radius: 11px; padding: 14px; cursor: pointer; transition: .15s; }
.plan:hover { border-color: var(--primary); background: rgba(79,140,255,.06); }
.plan-name { font-weight: 600; }
.plan-spec { font-size: 12px; color: var(--muted); margin-top: 3px; }
.plan-price { font-size: 18px; font-weight: 700; color: var(--primary); }
.plan-price small { font-size: 12px; color: var(--muted); font-weight: 400; }

/* 导航 */
.navbar { display: flex; gap: 6px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 5px; margin-bottom: 16px; }
.nav-item { flex: 1; background: transparent; border: 0; color: var(--muted); padding: 9px 4px; border-radius: 8px; cursor: pointer; font-size: 14px; }
.nav-item.active { background: var(--primary); color: #fff; font-weight: 600; }
.panel.hidden { display: none; }

/* 套餐网格 */
.plans-grid { display: flex; flex-direction: column; gap: 12px; margin-top: 14px; }
.plan-card { border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.plan-card .row { align-items: flex-start; }
.plan-card h3 { font-size: 16px; margin-bottom: 6px; }
.plan-card .price { font-size: 24px; font-weight: 700; color: var(--primary); }
.plan-card .price small { font-size: 12px; color: var(--muted); font-weight: 400; }
.plan-feats { list-style: none; margin: 10px 0 14px; font-size: 13px; color: var(--muted); }
.plan-feats li { padding: 3px 0; }
.plan-feats li::before { content: "✓ "; color: var(--green); }

/* 充值记录 */
.orders-list { margin-top: 12px; }
.order-row { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--line); }
.order-row:last-child { border-bottom: 0; }
.order-no { font-size: 12px; color: var(--muted); font-family: monospace; }
.order-plan { font-size: 14px; font-weight: 500; margin-bottom: 3px; }
.order-amt { font-size: 16px; font-weight: 700; }
.ostat { font-size: 12px; padding: 3px 9px; border-radius: 999px; }
.ostat.paid { background: rgba(52,211,153,.15); color: var(--green); }
.ostat.pending { background: rgba(251,191,36,.15); color: var(--amber); }

/* 教程 */
.tut-tabs { display: flex; gap: 6px; margin: 14px 0; flex-wrap: wrap; }
.tut-tab { background: var(--card-2); border: 1px solid var(--line); color: var(--muted); padding: 7px 14px; border-radius: 8px; cursor: pointer; font-size: 13px; }
.tut-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.tut-content { font-size: 14px; line-height: 1.7; }
.tut-content h3 { font-size: 15px; margin: 14px 0 6px; }
.tut-content ol { margin: 8px 0 8px 20px; color: var(--text); }
.tut-content li { margin: 6px 0; }
.tut-content code { background: var(--card-2); padding: 2px 6px; border-radius: 5px; font-size: 13px; }
.tut-content a { color: var(--primary); }

/* 支付方式按钮 */
.btn.pay { flex: 1; color: #fff; border: 0; padding: 12px; font-weight: 600; }
.btn.pay.alipay { background: #1677ff; }
.btn.pay.wxpay { background: #07c160; }
.plan.selected { border-color: var(--primary); background: rgba(79,140,255,.1); }

/* toast */
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: var(--card-2); border: 1px solid var(--line); padding: 12px 20px; border-radius: 10px; font-size: 14px; z-index: 60; }