:root {
  --bg-deep: #060910;
  --bg: #0c1018;
  --card: rgba(22, 28, 40, 0.92);
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #e8eef7;
  --muted: #94a3b8;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-dim: #4338ca;
  --ok: #34d399;
  --ok-bg: rgba(52, 211, 153, 0.12);
  --warn: #fbbf24;
  --warn-bg: rgba(251, 191, 36, 0.1);
  --err: #f87171;
  --err-bg: rgba(248, 113, 113, 0.1);
  --border: rgba(255, 255, 255, 0.08);
  --input-bg: rgba(0, 0, 0, 0.35);
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 24px 48px -12px rgba(0, 0, 0, 0.5);
  --safe-bottom: env(safe-area-inset-bottom, 0);
  --safe-top: env(safe-area-inset-top, 0);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body.page {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  padding: calc(12px + var(--safe-top)) 12px calc(24px + var(--safe-bottom));
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(ellipse 100% 70% at 50% -20%, rgba(99, 102, 241, 0.22), transparent 50%),
    radial-gradient(ellipse 80% 50% at 100% 0%, rgba(14, 165, 233, 0.08), transparent),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
  background-attachment: fixed;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: #a5b4fc;
  text-decoration: none;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.card {
  max-width: 1040px;
  margin: 0 auto;
  padding: clamp(18px, 4vw, 28px);
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.card.narrow {
  max-width: 440px;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(1.25rem, 4vw, 1.55rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  margin: 0 0 14px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--muted);
}

.muted {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.form label {
  display: block;
  margin: 14px 0 6px;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--muted);
}

.form input,
.form select,
.form textarea {
  width: 100%;
  max-width: 100%;
  padding: 12px 14px;
  min-height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
}

.form textarea {
  min-height: 120px;
  resize: vertical;
  line-height: 1.5;
}

.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: none;
  border-color: rgba(129, 140, 248, 0.55);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.btn:hover {
  background: rgba(255, 255, 255, 0.1);
  text-decoration: none;
}

.btn:active {
  transform: scale(0.98);
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dim) 100%);
  border-color: rgba(255, 255, 255, 0.12);
  color: #fff;
  box-shadow: 0 8px 20px -6px rgba(79, 70, 229, 0.55);
}

.btn.primary:hover {
  color: #fff;
  filter: brightness(1.05);
  text-decoration: none;
}

.btn.danger {
  background: var(--err-bg);
  border-color: rgba(248, 113, 113, 0.35);
  color: #fecaca;
}

.btn.small {
  min-height: 40px;
  padding: 8px 12px;
  font-size: 0.85rem;
}

.row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.mt {
  margin-top: 18px;
}

.mb {
  margin-bottom: 16px;
}

/* —— 后台顶栏 —— */
.admin-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.admin-brand {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(232, 238, 247, 0.45);
  text-decoration: none;
}

.admin-brand:hover {
  color: rgba(232, 238, 247, 0.65);
  text-decoration: none;
}

.admin-brand span {
  display: inline-block;
  margin-left: 8px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(99, 102, 241, 0.2);
  border: 1px solid rgba(129, 140, 248, 0.35);
  color: #c7d2fe;
  letter-spacing: 0.06em;
  text-transform: none;
  font-size: 0.75rem;
  font-weight: 600;
}

.admin-nav {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  align-items: center;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 2px;
  margin-left: auto;
  max-width: 100%;
  scrollbar-width: thin;
}

.admin-nav::-webkit-scrollbar {
  height: 4px;
}

.admin-nav::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

.admin-nav a {
  flex: 0 0 auto;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  color: rgba(232, 238, 247, 0.75);
  border: 1px solid transparent;
  white-space: nowrap;
}

.admin-nav a:hover {
  color: #f8fafc;
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.06);
  text-decoration: none;
}

/* —— 表格 —— */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 8px 0 4px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.2);
}

table.data {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 0.88rem;
}

table.data th,
table.data td {
  border-bottom: 1px solid var(--border);
  padding: 12px 10px;
  text-align: left;
  vertical-align: middle;
}

table.data th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: none;
  letter-spacing: 0.02em;
  background: rgba(0, 0, 0, 0.25);
}

table.data tr:last-child td {
  border-bottom: none;
}

table.data tbody tr:hover td {
  background: rgba(99, 102, 241, 0.04);
}

.table-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.table-actions form {
  display: inline-flex;
}

/* —— 状态标签 —— */
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge--paid {
  background: var(--ok-bg);
  color: #6ee7b7;
  border: 1px solid rgba(52, 211, 153, 0.25);
}

.badge--expired {
  background: var(--warn-bg);
  color: #fcd34d;
  border: 1px solid rgba(251, 191, 36, 0.25);
}

.badge--pending {
  background: rgba(148, 163, 184, 0.12);
  color: #cbd5e1;
  border: 1px solid rgba(148, 163, 184, 0.2);
}

.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin: 12px 0;
  font-size: 0.9rem;
}

.alert.error {
  background: var(--err-bg);
  border: 1px solid rgba(248, 113, 113, 0.35);
  color: #fecaca;
}

.alert.ok {
  background: var(--ok-bg);
  border: 1px solid rgba(52, 211, 153, 0.3);
  color: #a7f3d0;
}

.pay-amount {
  font-size: clamp(1.75rem, 6vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.qr-wrap {
  margin: 24px 0;
  text-align: center;
}

.qr-wrap img {
  max-width: min(260px, 88vw);
  border-radius: 12px;
  background: #fff;
  padding: 10px;
}

code {
  background: rgba(0, 0, 0, 0.35);
  padding: 2px 7px;
  border-radius: 6px;
  font-size: 0.84em;
  word-break: break-word;
}

.doc-pre {
  white-space: pre-wrap;
  word-break: break-all;
  background: rgba(0, 0, 0, 0.35);
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-size: 0.82rem;
  line-height: 1.55;
  overflow-x: auto;
  max-width: 100%;
}

.timer {
  margin: 16px 0;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--input-bg);
  font-size: 0.95rem;
}

.timer strong {
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}

.timer.expired {
  border-color: rgba(248, 113, 113, 0.35);
  background: var(--err-bg);
  color: #fecaca;
}

.timer.paid-hint {
  border-color: rgba(52, 211, 153, 0.35);
  background: var(--ok-bg);
  color: #a7f3d0;
}

/* 兼容旧类名 */
.topbar {
  display: contents;
}

/* —— 登录 / 安装卡片描边 —— */
.admin-login-card {
  position: relative;
  z-index: 0;
}

.admin-login-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: calc(var(--radius) + 1px);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.35), rgba(14, 165, 233, 0.15), transparent);
  z-index: -1;
  opacity: 0.6;
}

.admin-login-foot {
  margin-top: 20px;
  text-align: center;
  font-size: 0.86rem;
  color: var(--muted);
}

.admin-login-foot a {
  font-weight: 500;
}

/* —— 小屏：顶栏与表格 —— */
@media (max-width: 640px) {
  body.page {
    padding-left: 10px;
    padding-right: 10px;
  }

  .admin-header {
    flex-direction: column;
    align-items: stretch;
  }

  .admin-nav {
    margin-left: 0;
    justify-content: flex-start;
    padding-bottom: 6px;
  }

  table.data {
    min-width: 580px;
  }

  table.data th,
  table.data td {
    padding: 10px 8px;
    font-size: 0.82rem;
  }
}

@media (max-width: 400px) {
  table.data {
    min-width: 520px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn {
    transition: none;
  }
}