:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --ink: #1a1d23;
  --muted: #6b7280;
  --line: #e5e7eb;
  --brand: #0f7b6c;
  --brand-ink: #ffffff;
  --danger: #dc2626;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 14px/1.55 -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 208px;
  flex: 0 0 208px;
  background: #14181f;
  color: #d7dce5;
  display: flex;
  flex-direction: column;
  padding: 18px 14px;
  gap: 18px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand { display: flex; gap: 10px; align-items: center; }
.brand .logo {
  width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, #12a594, #0b6b5f);
  color: #fff; font-weight: 700;
}
.brand b { display: block; font-size: 14px; color: #fff; }
.brand small { color: #8b93a1; font-size: 11px; }

.sidebar nav { display: flex; flex-direction: column; gap: 2px; }
.sidebar nav a {
  padding: 9px 12px; border-radius: 8px; color: #b6bec9; font-size: 13px;
}
.sidebar nav a:hover { background: #1d232d; text-decoration: none; color: #fff; }
.sidebar nav a.active { background: #0f7b6c; color: #fff; }

.sidebar-foot { margin-top: auto; font-size: 12px; color: #8b93a1; display: flex; flex-direction: column; gap: 6px; }
.sidebar-foot .who { color: #d7dce5; font-weight: 600; }

.main { flex: 1; min-width: 0; padding: 24px 28px 48px; }
.main h1 { font-size: 20px; margin: 0 0 6px; }
.main h2 { font-size: 14px; margin: 0; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.mono { font-family: ui-monospace, Consolas, monospace; font-size: 12.5px; }
.strong { font-weight: 600; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 18px 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.stat { padding: 14px 16px; display: flex; flex-direction: column; gap: 6px; }
.stat span { color: var(--muted); font-size: 12px; }
.stat b { font-size: 22px; }

.grid-2 { display: grid; grid-template-columns: 1.3fr 1fr; gap: 14px; }
@media (max-width: 1100px) { .grid-2 { grid-template-columns: 1fr; } }

.card-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; border-bottom: 1px solid var(--line); }

.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: middle; }
.table th { font-size: 12px; color: var(--muted); font-weight: 600; background: #fafbfc; }
.table tbody tr:hover { background: #f9fafb; }
.table td.empty { text-align: center; color: var(--muted); padding: 28px; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; line-height: 1.7; }
.badge.green { background: #e7f6f0; color: #0b7a5f; }
.badge.gray { background: #eef0f3; color: #5b6472; }
.badge.red { background: #fdecec; color: #b42318; }
.badge.orange { background: #fff4e5; color: #b26a00; }

.page-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.page-head h1 { margin: 0; }
.head-actions { display: flex; gap: 8px; align-items: center; }

.toolbar { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.toolbar input, .toolbar select { padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: #fff; font-size: 13px; }
.toolbar input { min-width: 260px; }

button, .button {
  padding: 8px 12px; border-radius: 8px; border: 1px solid var(--line);
  background: #fff; color: var(--ink); font-size: 13px; cursor: pointer; font-family: inherit;
}
button:hover, .button:hover { border-color: #c9ced6; text-decoration: none; }
button.primary, .button.primary { background: var(--brand); border-color: var(--brand); color: var(--brand-ink); }
button.primary:hover { background: #0b6b5f; }
button.tiny { padding: 4px 8px; font-size: 12px; }
button:disabled { opacity: .5; cursor: not-allowed; }

form.inline { display: inline; }
.actions { white-space: nowrap; display: flex; gap: 6px; align-items: center; }

.flash { padding: 10px 14px; border-radius: 10px; background: #e7f6f0; color: #0b7a5f; margin-bottom: 14px; }
.flash.error { background: #fdecec; color: #b42318; }

.pager { display: flex; gap: 6px; margin-top: 14px; flex-wrap: wrap; }
.pager a { padding: 5px 10px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.pager a.active { background: var(--brand); border-color: var(--brand); color: #fff; }

.code { cursor: pointer; padding: 2px 6px; border-radius: 6px; background: #f2f4f7; }
.code:hover { background: #e3e8ef; }

dialog {
  border: none; border-radius: 14px; padding: 20px; width: 360px; max-width: 92vw;
  box-shadow: 0 20px 50px rgba(15, 23, 42, .25);
}
dialog::backdrop { background: rgba(15, 23, 42, .35); }
dialog h3 { margin: 0 0 12px; font-size: 15px; }
dialog label { display: block; margin-bottom: 10px; font-size: 12px; color: var(--muted); }
dialog input, dialog select, dialog textarea {
  width: 100%; margin-top: 4px; padding: 8px 10px; border: 1px solid var(--line);
  border-radius: 8px; font-size: 13px; font-family: inherit; color: var(--ink);
}
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 14px; }

.login-body { display: grid; place-items: center; min-height: 100vh; background: #0f1216; }
.login-card {
  width: 340px; background: #fff; border-radius: 16px; padding: 26px;
  display: flex; flex-direction: column; gap: 12px; box-shadow: 0 24px 60px rgba(0, 0, 0, .35);
}
.login-card h1 { margin: 0; font-size: 18px; }
.login-card p { margin: 0 0 4px; font-size: 12px; }
.login-card label { font-size: 12px; color: var(--muted); display: flex; flex-direction: column; gap: 4px; }
.login-card input { padding: 9px 10px; border: 1px solid var(--line); border-radius: 8px; font-size: 14px; }
.login-card button { margin-top: 6px; }

.toast {
  position: fixed; left: 50%; bottom: 32px; transform: translateX(-50%);
  background: #14181f; color: #fff; padding: 9px 16px; border-radius: 999px; font-size: 13px;
  opacity: 0; transition: opacity .2s; pointer-events: none; z-index: 9999;
}
.toast.show { opacity: 1; }

/* ---------- 用户端：注册 / 登录 / 开通会员 ---------- */
.user-body { background: #f4f6f8; }
.user-top {
  display: flex; align-items: center; gap: 18px;
  padding: 12px 28px; background: #fff; border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
}
.user-brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-size: 15px; }
.user-brand:hover { text-decoration: none; }
.user-brand .logo {
  width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center;
  background: linear-gradient(135deg, #12a594, #0b6b5f); color: #fff; font-weight: 700; font-size: 13px;
}
.user-top nav { display: flex; gap: 4px; flex: 1; }
.user-top nav a { padding: 7px 12px; border-radius: 8px; color: var(--muted); font-size: 13px; }
.user-top nav a:hover { background: #f1f3f6; text-decoration: none; color: var(--ink); }
.user-top nav a.active { background: #e7f6f0; color: #0b7a5f; font-weight: 600; }
.user-auth { display: flex; align-items: center; gap: 8px; }

.user-main { max-width: 960px; margin: 0 auto; padding: 24px 20px 60px; }
.user-main h1 { font-size: 20px; margin: 0 0 6px; }

.user-card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 22px; }
.user-card.narrow { max-width: 420px; margin: 24px auto; }
.user-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.user-head h1 { margin: 0 0 4px; }

.user-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin: 16px 0; }
.user-stats > div { background: #f8fafb; border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; display: flex; flex-direction: column; gap: 4px; }
.user-stats span { font-size: 12px; color: var(--muted); }
.user-stats b { font-size: 15px; }
.user-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.stack { display: flex; flex-direction: column; gap: 12px; margin: 16px 0; }
.stack label { display: flex; flex-direction: column; gap: 5px; font-size: 12px; color: var(--muted); }
.stack input { padding: 10px 12px; border: 1px solid var(--line); border-radius: 9px; font-size: 14px; }
.stack button { margin-top: 4px; }

.plan-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.plan-card {
  background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 18px 16px;
  display: flex; flex-direction: column; gap: 6px; align-items: flex-start;
}
.plan-card.free { border-color: #b7e4d8; }
.plan-name { font-size: 14px; font-weight: 600; }
.plan-price { font-size: 24px; font-weight: 700; color: var(--brand); }
.plan-days { font-size: 12px; color: var(--muted); margin-bottom: 8px; }
.plan-card button { width: 100%; }

.order-body { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; padding: 16px; }
@media (max-width: 760px) { .order-body { grid-template-columns: 1fr; } }
.order-info p { margin: 0 0 8px; font-size: 13px; }
.pay-box { background: #f8fafb; border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.pay-box h3 { margin: 0 0 8px; font-size: 13px; }
.pay-note { font-size: 12.5px; color: #4b5563; margin: 0 0 10px; line-height: 1.7; }
.pay-qr { width: 180px; height: 180px; object-fit: contain; background: #fff; border-radius: 10px; border: 1px solid var(--line); margin-bottom: 10px; }
.pay-box label { display: flex; flex-direction: column; gap: 5px; font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.pay-box input { padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; font-size: 13px; }