/* ==========================================================================
   xray-panel · style.css
   手写设计系统：无构建、无 CDN、无外部图片。移动优先，960px 以上切侧边栏布局。

   设计语言（2026-11-04 重做）：
     · 深空底色 + 极光渐变 + 细网格，作为唯一的"装饰"，不用插画/图片
     · 卡片是"玻璃层"：细描边 + 顶部内高光 + 大圆角 + 柔和投影
     · 强调色是 靛→青 渐变，只出现在按钮、进度、当前导航这类"有动作"的地方
     · 字号阶梯 14/15/16/22/28，标题负字距，数字等宽（tabular-nums）

   结构：1 字体与令牌 / 2 基础 / 3 背景层 / 4 布局 / 5 导航 / 6 卡片与数字
        7 表格 / 8 表单 / 9 按钮 / 10 进度条与徽标 / 11 代码与二维码
        12 提示 / 13 登录与错误页 / 14 用户自助页 / 15 桌面布局 / 16 动效
   ========================================================================== */

/* 1. 字体与令牌 =========================================================== */

/* 拉丁与数字用 Inter（可变字重，48 KB，只 contain latin 子集）；
   中文回落到系统中文字体，视觉上不会打架。 */
@font-face {
  font-family: "Inter Var";
  src: url("/static/fonts/inter-latin-vf.woff2") format("woff2-variations");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: light;

  --bg: #eff2f9;
  --card: #ffffff;
  --card-2: #f4f7fd;
  --card-3: #e7edf9;

  --ink: #0d1322;
  --ink-dim: #4b5567;
  --ink-faint: #79849a;

  --line: #e1e7f2;
  --line-2: #ccd5e6;

  --accent: #4a43d6;
  --accent-bright: #5b5bf5;
  --accent-ink: #ffffff;
  --grad: linear-gradient(135deg, #5b5bf5 0%, #2fa6ff 100%);
  --accent-soft: #eceaff;
  --accent-line: #c9c5fa;

  --ok: #0b6b46;
  --ok-soft: #e1f5ec;
  --ok-line: #a6dfc3;
  --warn: #8a5a06;
  --warn-soft: #fdf3de;
  --warn-line: #efd298;
  --danger: #a5211b;
  --danger-soft: #feecea;
  --danger-line: #f5bdb8;
  --amber: #a06a00;

  --radius: 18px;
  --radius-md: 14px;
  --radius-sm: 11px;
  --pill: 999px;
  --tap: 44px;

  --font-body: "Inter Var", "Inter", system-ui, -apple-system, "Segoe UI", Roboto,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas,
    "Liberation Mono", monospace;

  --sh-1: 0 1px 2px rgba(16, 24, 40, .05), 0 10px 24px -18px rgba(16, 24, 40, .38);
  --sh-2: 0 2px 6px rgba(16, 24, 40, .07), 0 28px 56px -32px rgba(16, 24, 40, .5);
  --hi: inset 0 1px 0 rgba(255, 255, 255, .85);
  --glow: 0 12px 26px -14px rgba(91, 91, 245, .8);

  --aur-1: rgba(122, 112, 255, .34);
  --aur-2: rgba(56, 178, 255, .24);
  --aur-3: rgba(255, 122, 200, .14);
  --grid: rgba(13, 19, 34, .055);
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;

    --bg: #06090f;
    --card: #0d1421;
    --card-2: #121a2a;
    --card-3: #1a2435;

    --ink: #e9edf7;
    --ink-dim: #9ca8bd;
    --ink-faint: #6f7b92;

    --line: rgba(255, 255, 255, .075);
    --line-2: rgba(255, 255, 255, .15);

    --accent: #a5b4ff;
    --accent-bright: #8b93ff;
    --accent-ink: #ffffff;
    --grad: linear-gradient(135deg, #6d5efc 0%, #2fb8ff 100%);
    --accent-soft: rgba(163, 180, 255, .13);
    --accent-line: rgba(163, 180, 255, .34);

    --ok: #5ad9a2;
    --ok-soft: rgba(90, 217, 162, .12);
    --ok-line: rgba(90, 217, 162, .3);
    --warn: #f6c877;
    --warn-soft: rgba(246, 200, 119, .12);
    --warn-line: rgba(246, 200, 119, .3);
    --danger: #ff918a;
    --danger-soft: rgba(255, 145, 138, .12);
    --danger-line: rgba(255, 145, 138, .3);
    --amber: #f2c069;

    --sh-1: 0 1px 0 rgba(255, 255, 255, .035) inset, 0 18px 36px -26px #000;
    --sh-2: 0 1px 0 rgba(255, 255, 255, .05) inset, 0 36px 64px -40px #000;
    --hi: inset 0 1px 0 rgba(255, 255, 255, .06);
    --glow: 0 14px 30px -16px rgba(109, 94, 252, .9);

    --aur-1: rgba(109, 94, 252, .40);
    --aur-2: rgba(47, 184, 255, .22);
    --aur-3: rgba(255, 110, 196, .13);
    --grid: rgba(255, 255, 255, .045);
  }
}

/* 2. 基础 ================================================================= */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
  scrollbar-color: var(--line-2) transparent;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 420;
  line-height: 1.6;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3 {
  line-height: 1.25;
  margin: 0 0 .5rem;
  font-weight: 680;
  letter-spacing: -.018em;
  text-wrap: balance;
}

p { margin: 0 0 .75rem; }

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color .15s ease, opacity .15s ease;
}
a:hover { opacity: .82; }

img, svg { max-width: 100%; }

code, pre, .mono {
  font-family: var(--font-mono);
  font-variant-ligatures: none;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 1rem 0;
}

::selection {
  background: var(--accent-soft);
  color: var(--ink);
}

:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 2px;
  border-radius: 6px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.sprite {
  position: absolute;
  width: 0; height: 0;
  overflow: hidden;
}

/* 统一图标：跟随文字颜色的描边图标 */
.ico {
  width: 1.15em;
  height: 1.15em;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: -.18em;
}

.skip-link {
  position: absolute;
  left: 8px; top: -60px;
  z-index: 100;
  padding: .6rem .9rem;
  background: var(--card);
  color: var(--ink);
  border: 1px solid var(--accent-line);
  border-radius: var(--radius-sm);
  box-shadow: var(--sh-2);
  font-weight: 600;
  text-decoration: none;
  transition: top .15s ease;
}
.skip-link:focus { top: 8px; }

/* fallbacks are declared inline next to color-mix() */

/* 3. 背景层：极光 + 网格 ================================================ */
body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

body::before {
  background:
    radial-gradient(42% 48% at 16% -6%, var(--aur-1), transparent 68%),
    radial-gradient(46% 46% at 88% 2%, var(--aur-2), transparent 70%),
    radial-gradient(38% 40% at 62% 28%, var(--aur-3), transparent 72%);
  filter: blur(28px) saturate(115%);
  opacity: .9;
}

body::after {
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(78% 62% at 50% 0%, #000 20%, transparent 78%);
  mask-image: radial-gradient(78% 62% at 50% 0%, #000 20%, transparent 78%);
  opacity: .6;
}

.page-admin::before { opacity: .45; }
.page-admin::after { opacity: .4; }
.page-portal::before { opacity: .8; }

/* 4. 布局 ================================================================= */
.shell { padding: 1rem; }

.content {
  max-width: 1180px;
  outline: none;
}

.page-public .content,
.page-login .content,
.page-error .content { margin: 0 auto; }

.site-foot {
  padding: 1.5rem 1rem 2rem;
  max-width: 1180px;
  margin: 0 auto;
  text-align: center;
  color: var(--ink-faint);
  font-size: 14px;
  letter-spacing: .01em;
}

.page-head { margin: 0 0 1.25rem; }
.page-title {
  font-size: 1.55rem;
  margin: 0 0 .3rem;
  letter-spacing: -.028em;
}
.page-sub {
  font-size: 15px;
  margin: 0;
  color: var(--ink-dim);
}

.page-head-row {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  align-items: flex-start;
  justify-content: space-between;
}

.cols { display: grid; gap: 1rem; align-items: start; }
.stack-gap { display: grid; gap: 1rem; align-content: start; }
.stack { display: grid; gap: .35rem; }

/* 5. 导航 ================================================================= */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .55rem 1rem;
  background: var(--bg);                                   /* fallback: 无 color-mix 时 */
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: -.015em;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--grad);
  color: #fff;
  font-size: 15px;
  line-height: 1;
  box-shadow: var(--glow), inset 0 1px 0 rgba(255, 255, 255, .35);
}
.brand-mark .ico { width: 18px; height: 18px; stroke-width: 2; }

.brand-text { white-space: nowrap; }
.brand-dim {
  margin-left: .3rem;
  color: var(--ink-dim);
  font-weight: 500;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: .6rem;
  min-width: 0;
}

.user-chip {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  min-width: 0;
  padding: .25rem .7rem .25rem .25rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--pill);
  box-shadow: var(--sh-1);
  font-size: 14px;
  color: var(--ink-dim);
}
.avatar {
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 13px;
  text-transform: uppercase;
}
.user-name {
  max-width: 32vw;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 600;
  color: var(--ink);
}

/* 手机：顶部横向可滚动的 tab */
.sidenav {
  position: sticky;
  top: 0;
  z-index: 20;
  margin: -.25rem -1rem 1rem;
  background: var(--bg);                                   /* fallback */
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.sidenav-brand { display: none; }

.nav-list {
  display: flex;
  gap: .25rem;
  margin: 0;
  padding: .4rem .6rem;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.nav-list::-webkit-scrollbar { display: none; }

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: .45rem;
  min-height: var(--tap);
  padding: .45rem .8rem;
  border-radius: var(--radius-sm);
  color: var(--ink-dim);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  white-space: nowrap;
  transition: background-color .15s ease, color .15s ease;
}
.nav-link .ico { opacity: .8; }
.nav-link:hover {
  background: var(--card);
  color: var(--ink);
  opacity: 1;
}
.nav-link[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent);
}
.nav-link[aria-current="page"] .ico { opacity: 1; }

.logout-form { padding: 0 .6rem .6rem; }

/* 手机：退出按钮并到 tab 行右侧，省一行高度 */
@media (max-width: 959px) {
  .sidenav { display: flex; align-items: center; }
  .nav-list { flex: 1 1 auto; min-width: 0; }
  .logout-form {
    flex: 0 0 auto;
    padding: 0 .6rem;
    border-left: 1px solid var(--line);
  }
  .logout-form .btn {
    min-height: 38px;
    padding: .3rem .65rem;
    font-size: 14px;
  }
  .logout-form .logout-text {
    position: absolute;
    width: 1px; height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
  }
  .logout-form .btn { width: 38px; min-height: 38px; padding: 0; }
}

/* 6. 卡片与数字 ========================================================== */
.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem;
  box-shadow: var(--sh-1), var(--hi);
  margin-bottom: 1rem;
}
.card:last-child { margin-bottom: 0; }

.card-title {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-size: 1.02rem;
  margin: 0 0 .85rem;
  letter-spacing: -.012em;
}

.card-danger {
  border-color: var(--danger-line);
  background:
    linear-gradient(180deg, var(--danger-soft), transparent 55%),
    var(--card);
}

.empty-card { text-align: center; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .8rem;
  margin-bottom: 1rem;
}

.stat {
  margin: 0;
  padding: .95rem 1rem;
  overflow: hidden;
}
.stat::after {
  content: "";
  position: absolute;
  inset: -40% -30% auto auto;
  width: 10rem;
  height: 10rem;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-soft), transparent 70%);
  opacity: .85;
  pointer-events: none;
}

.stat-ico {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  margin-bottom: .55rem;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--accent-line);
}
.stat-ico .ico { width: 17px; height: 17px; }

.stat-label {
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.stat-value {
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
  margin: .1rem 0 .15rem;
}
.stat-sub { font-size: 14px; color: var(--ink-dim); }

.count-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  height: 1.5rem;
  padding: 0 .45rem;
  border-radius: var(--pill);
  background: var(--warn-soft);
  color: var(--warn);
  border: 1px solid var(--warn-line);
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.problem-list { list-style: none; margin: 0; padding: 0; }
.problem-item {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem .75rem;
  align-items: center;
  justify-content: space-between;
  padding: .75rem 0;
  border-bottom: 1px solid var(--line);
}
.problem-item:last-child { border-bottom: 0; }
.problem-main { min-width: 0; }
.problem-line {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  align-items: center;
}
.problem-name { font-weight: 650; }

.cont-list { list-style: none; margin: 0; padding: 0; }
.cont-item {
  display: flex;
  align-items: center;
  gap: .55rem;
  padding: .55rem 0;
  border-bottom: 1px solid var(--line);
}
.cont-item:last-child { border-bottom: 0; }
.cont-name {
  flex: 1 1 auto;
  min-width: 0;
  overflow-wrap: anywhere;
  font-size: 14.5px;
}
.cont-state { font-size: 13.5px; color: var(--ink-faint); }
.cont-item.is-bad .cont-state { color: var(--danger); font-weight: 600; }

.kv {
  display: grid;
  grid-template-columns: minmax(6rem, auto) 1fr;
  gap: .5rem .95rem;
  margin: 0 0 .5rem;
}
.kv dt {
  color: var(--ink-faint);
  font-size: 14px;
  font-weight: 500;
}
.kv dd { margin: 0; overflow-wrap: anywhere; }
.kv dd.mono { font-size: 14.5px; }

.uri-block { margin-bottom: 1.1rem; }
.uri-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  margin-bottom: .4rem;
}

/* 7. 表格 ================================================================= */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--sh-1), var(--hi);
  margin-bottom: 1rem;
}

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 640px;
  font-size: 14.5px;
}

th, td {
  padding: .7rem .85rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--card-2);
  font-weight: 600;
  font-size: 12.5px;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--ink-faint);
  white-space: nowrap;
}

tbody tr { transition: background-color .12s ease; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: var(--card-2); }

table.table-users { min-width: 880px; }
.cols .table-wrap table { min-width: 0; }
.table-audit table { min-width: 780px; }
.table-audit tbody td { font-family: var(--font-mono); font-size: 13.5px; }
.table-audit th { font-family: var(--font-body); }

.cell-name { min-width: 12rem; }
.cell-name .mono {
  display: block;
  font-size: 12.5px;
  color: var(--ink-faint);
}
.name-link {
  font-weight: 650;
  text-decoration: none;
  color: var(--ink);
}
.name-link:hover { color: var(--accent); opacity: 1; }
.note { display: block; overflow-wrap: anywhere; }

/* 表格里的第二行小字（到期·速率、最后在线） */
.sub-line {
  display: block;
  margin-top: .1rem;
  font-size: 12.5px;
  color: var(--ink-faint);
  white-space: nowrap;
}

.cell-quota { min-width: 11rem; }
.cell-result,
.cell-detail {
  max-width: 22rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.cell-actions { min-width: 13.5rem; }

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  align-items: center;
}

.mini-details { display: inline-block; }
.mini-details > summary {
  list-style: none;
  cursor: pointer;
  user-select: none;
}
.mini-details > summary::-webkit-details-marker { display: none; }
.mini-panel {
  display: grid;
  gap: .45rem;
  margin-top: .45rem;
  min-width: min(18rem, 70vw);
  padding: .6rem;
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.empty {
  padding: 1.5rem .5rem;
  text-align: center;
  color: var(--ink-faint);
  font-size: 15px;
}

/* 8. 表单 ================================================================= */
.field { margin-bottom: 1.05rem; }

.field label,
.field .check-label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: .01em;
  color: var(--ink-dim);
  margin-bottom: .4rem;
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="search"],
input[type="datetime-local"],
select,
textarea {
  display: block;
  width: 100%;
  min-height: var(--tap);
  padding: .6rem .8rem;
  font-family: inherit;
  font-size: 16px;          /* ≥16px 防 iOS 聚焦时自动放大 */
  font-weight: 450;
  color: var(--ink);
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  -webkit-appearance: none;
  appearance: none;
  transition: border-color .15s ease, box-shadow .15s ease, background-color .15s ease;
}

textarea {
  min-height: 5.5rem;
  resize: vertical;
  line-height: 1.55;
}

input:hover:not([readonly]),
textarea:hover,
select:hover { border-color: var(--line-2); }

input:focus,
textarea:focus,
select:focus {
  outline: none;
  background: var(--card);
  border-color: var(--accent-bright);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

input[readonly] {
  background: var(--card-3);
  color: var(--ink-dim);
  cursor: text;
  font-size: 14px;
}

input::placeholder,
textarea::placeholder { color: var(--ink-faint); opacity: 1; }

.field-inline { margin-top: .3rem; }

.field .check-label {
  display: flex;
  align-items: center;
  gap: .6rem;
  min-height: var(--tap);
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
}

input[type="checkbox"] {
  width: 22px;
  height: 22px;
  min-height: 0;
  margin: 0;
  accent-color: var(--accent-bright);
  flex: 0 0 auto;
}

.hint {
  margin: .4rem 0 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-faint);
}

.copy-row {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  align-items: stretch;
}
.copy-row .copy-field {
  flex: 1 1 12rem;
  min-width: 0;
  font-size: 14px;
}
.copy-row .btn { flex: 0 0 auto; }

.search-form {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  align-items: stretch;
  margin: 0 0 1rem;
}
.search-input { flex: 1 1 14rem; min-width: 0; }

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  align-items: center;
  margin: 0 0 1rem;
}

.danger-grid {
  display: grid;
  gap: .85rem;
  grid-template-columns: 1fr;
}
.danger-grid form { display: grid; gap: .35rem; }
.danger-grid .hint { margin: 0; }

/* 9. 按钮 ================================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  min-height: var(--tap);
  padding: .55rem 1.05rem;
  font-family: inherit;
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: -.005em;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  box-shadow: 0 1px 2px rgba(16, 24, 40, .06);
  transition: background-color .15s ease, border-color .15s ease,
              box-shadow .15s ease, transform .08s ease, filter .15s ease;
}
.btn:hover { background: var(--card-2); opacity: 1; }
.btn:active { transform: translateY(1px) scale(.995); }

.btn-primary {
  background: var(--grad);
  border-color: transparent;
  color: var(--accent-ink);
  box-shadow: var(--glow), inset 0 1px 0 rgba(255, 255, 255, .28);
}
.btn-primary:hover {
  background: var(--grad);
  filter: brightness(1.07) saturate(1.05);
  box-shadow: var(--glow), inset 0 1px 0 rgba(255, 255, 255, .34);
}

.btn-danger {
  background: var(--danger);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 10px 24px -14px var(--danger);
}
.btn-danger:hover { background: var(--danger); filter: brightness(1.08); }

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink-dim);
  box-shadow: none;
}
.btn-ghost:hover {
  background: var(--card-2);
  border-color: var(--line-2);
  color: var(--ink);
}

.btn-sm {
  min-height: 38px;
  padding: .3rem .75rem;
  font-size: 14.5px;
  border-radius: 10px;
}

.btn-block { display: flex; width: 100%; }

.inline-form { display: inline-flex; margin: 0; }

/* 10. 进度条与徽标 ======================================================= */
.bar {
  position: relative;
  height: 8px;
  min-width: 5rem;
  margin-bottom: .4rem;
  background: var(--card-3);
  border-radius: var(--pill);
  overflow: hidden;
}
.bar > span {
  display: block;
  height: 100%;
  background: var(--grad);
  border-radius: var(--pill);
  transition: width .35s cubic-bezier(.4, 0, .2, 1);
}
.bar.is-warn > span {
  background: linear-gradient(90deg, #f0b64d, #f7c877);
}
.bar.is-over > span {
  background: linear-gradient(90deg, var(--danger), #ffb0aa);
}
.bar-lg { height: 12px; }

.usage-line {
  font-size: 1.05rem;
  margin: .4rem 0 .9rem;
  font-variant-numeric: tabular-nums;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .16rem .55rem;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  font-size: 13px;
  font-weight: 650;
  letter-spacing: .01em;
  line-height: 1.45;
  white-space: nowrap;
  background: var(--card-2);
  color: var(--ink-dim);
}
.badge-ok, .badge-on {
  background: var(--ok-soft);
  color: var(--ok);
  border-color: var(--ok-line);
}
.badge-warn, .badge-expired {
  background: var(--warn-soft);
  color: var(--warn);
  border-color: var(--warn-line);
}
.badge-err, .badge-over {
  background: var(--danger-soft);
  color: var(--danger);
  border-color: var(--danger-line);
}
.badge-off {
  background: var(--card-2);
  color: var(--ink-faint);
  border-color: var(--line);
}
.badge-neutral {
  background: var(--card-3);
  color: var(--ink-dim);
  border-color: var(--line);
}

.dot {
  display: inline-block;
  width: .5rem;
  height: .5rem;
  border-radius: 50%;
  background: var(--ink-faint);
  flex: 0 0 auto;
}
.dot-ok, .dot-on {
  background: var(--ok);
  box-shadow: 0 0 0 3px var(--ok-soft);
}
.dot-warn, .dot-expired {
  background: var(--amber);
  box-shadow: 0 0 0 3px var(--warn-soft);
}
.dot-err, .dot-over {
  background: var(--danger);
  box-shadow: 0 0 0 3px var(--danger-soft);
}
.dot-off { background: var(--ink-faint); }

/* 11. 代码与二维码 ======================================================= */
.code-block {
  display: block;
  margin: 0 0 .8rem;
  padding: .7rem .85rem;
  font-size: 13.5px;
  line-height: 1.6;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  overflow-x: auto;
  color: var(--ink-dim);
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  user-select: all;
  -webkit-user-select: all;
}
.code-block code {
  font: inherit;
  background: none;
  color: inherit;
  padding: 0;
}

.qr-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: .5rem;
}

.qr-item { margin: 0; text-align: center; }

.qr {
  display: inline-block;
  padding: 12px;
  background: #ffffff;      /* 二维码必须保持白底，深浅色都能扫 */
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--sh-1);
  line-height: 0;
}
.qr svg { display: block; width: 100%; max-width: 186px; height: auto; }
.qr-error {
  margin: 0;
  padding: 2.5rem .5rem;
  font-size: 14px;
  color: #5a6472;            /* 白底上的深灰，二维码缺失时的占位文字 */
  line-height: 1.45;
}

.qr-item figcaption { margin-top: .55rem; }

details.acc {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 0 .9rem;
  background: var(--card-2);
}
details.acc > summary {
  display: flex;
  align-items: center;
  gap: .5rem;
  min-height: var(--tap);
  font-weight: 600;
  font-size: 14.5px;
  color: var(--ink-dim);
  cursor: pointer;
  list-style: none;
}
details.acc > summary::-webkit-details-marker { display: none; }
details.acc > summary::before {
  content: "▸";
  color: var(--ink-faint);
  font-size: .85em;
}
details.acc[open] > summary::before { content: "▾"; }
.acc-body { padding: .35rem 0 1rem; }

/* 12. 提示 ================================================================ */
.flash,
.alert {
  display: flex;
  align-items: flex-start;
  gap: .6rem;
  margin: 0 0 1rem;
  padding: .75rem .9rem;
  font-size: 14.5px;
  font-weight: 550;
  line-height: 1.55;
  border: 1px solid;
  border-radius: var(--radius-md);
}
.flash-icon,
.alert-icon { flex: 0 0 auto; line-height: 1.5; }
.flash-text,
.alert-text { min-width: 0; overflow-wrap: anywhere; }
.alert-text pre {
  margin: .4rem 0 0;
  font-weight: 400;
  font-size: 13px;
  white-space: pre-wrap;
}

.flash-ok,
.alert-ok {
  background: var(--ok-soft);
  border-color: var(--ok-line);
  color: var(--ok);
}
.flash-err,
.alert-err {
  background: var(--danger-soft);
  border-color: var(--danger-line);
  color: var(--danger);
}
.alert-info {
  background: var(--accent-soft);
  border-color: var(--accent-line);
  color: var(--accent);
  font-weight: 500;
}
.alert-ok .copy-row { margin-top: .6rem; }
.alert-ok input[readonly] {
  color: var(--ink);
  background: var(--card);
}

.warn-line {
  display: flex;
  align-items: flex-start;
  gap: .45rem;
  margin: .75rem 0 0;
  font-size: 14px;
  font-weight: 550;
  color: var(--danger);
}

.muted { color: var(--ink-dim); }
.small { font-size: 14px; }
.nowrap { white-space: nowrap; }
.center { text-align: center; }
.tnum { font-variant-numeric: tabular-nums; }

/* 13. 登录与错误页 ======================================================= */
.page-login,
.page-error {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.page-login .topbar,
.page-error .topbar { display: none; }

.page-login .shell,
.page-error .shell {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.25rem;
}
.page-login .content,
.page-error .content { width: 100%; }

.auth-wrap {
  display: grid;
  place-items: center;
  width: 100%;
}
.page-login .auth-wrap,
.page-error .auth-wrap { min-height: 0; }

/* 玻璃卡片 + 渐变描边（mask 双图层做 1px 渐变边，无需额外元素） */
.auth-card,
.error-card {
  position: relative;
  width: 100%;
  max-width: 26.5rem;
  margin: 0;
  padding: 2rem 1.75rem 1.6rem;
  border-radius: 22px;
  background: var(--card);                                  /* fallback */
  background:
    linear-gradient(180deg,
      color-mix(in srgb, var(--card) 96%, transparent),
      color-mix(in srgb, var(--card) 88%, transparent)),
    var(--card);
  border: 1px solid transparent;
  box-shadow: var(--sh-2);
  -webkit-backdrop-filter: blur(22px) saturate(130%);
  backdrop-filter: blur(22px) saturate(130%);
}
.auth-card::before,
.error-card::before {
  content: "";
  position: absolute;
  inset: 0;
  padding: 1px;
  border-radius: inherit;
  background: linear-gradient(160deg,
    rgba(255, 255, 255, .55),
    rgba(140, 150, 255, .35) 32%,
    rgba(255, 255, 255, .04) 62%,
    rgba(120, 160, 255, .28));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.auth-head { text-align: center; margin-bottom: 1.5rem; }

.auth-logo {
  display: inline-grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin-bottom: .9rem;
  border-radius: 16px;
  background: var(--grad);
  color: #fff;
  box-shadow: var(--glow), inset 0 1px 0 rgba(255, 255, 255, .4);
}
.auth-logo .ico { width: 28px; height: 28px; stroke-width: 1.9; }

.auth-title {
  font-size: 1.4rem;
  margin: 0 0 .3rem;
  letter-spacing: -.03em;
}
.auth-sub {
  font-size: 14.5px;
  color: var(--ink-dim);
  margin: 0;
}

.auth-card .btn-block { margin-top: .35rem; min-height: 46px; font-size: 16px; }

.auth-foot {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  margin: 1.35rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink-faint);
  text-align: center;
}

.error-card { text-align: center; }
.error-code {
  font-family: var(--font-body);
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.05em;
  margin: 0 0 .5rem;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.error-title { font-size: 1.15rem; overflow-wrap: anywhere; }
.error-actions { margin: 1.25rem 0 0; }

/* 14. 用户自助页 ========================================================= */
.page-portal .shell { padding: 1rem; }
.portal { max-width: 46rem; margin: 0 auto; }

.portal-hero {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem;
  margin-bottom: 1rem;
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(109, 94, 252, .16), rgba(47, 184, 255, .09) 55%, transparent 85%),
    var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--sh-1), var(--hi);
  overflow: hidden;
}
.portal-hero::after {
  content: "";
  position: absolute;
  inset: -60% -20% auto auto;
  width: 18rem;
  height: 18rem;
  background: radial-gradient(circle, var(--aur-2), transparent 68%);
  opacity: .5;
  pointer-events: none;
}

.ring-wrap {
  position: relative;
  display: grid;
  place-items: center;
  width: 124px;
  height: 124px;
  flex: 0 0 auto;
}
.ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from -90deg,
    var(--ring-a, #6d5efc) 0,
    var(--ring-b, #35b6ff) calc(var(--p, 0) * 1%),
    var(--card-3) calc(var(--p, 0) * 1%));
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 8px), #000 calc(100% - 7px));
  mask: radial-gradient(farthest-side, transparent calc(100% - 8px), #000 calc(100% - 7px));
}
.ring.is-warn { --ring-a: #f0b64d; --ring-b: #f7d089; }
.ring.is-over { --ring-a: #d94a42; --ring-b: #ff9a93; }
.ring.is-unlimited {
  /* 不限流量：画成一整圈细环（低饱和），而不是色块 */
  background: conic-gradient(from -90deg,
    var(--accent-line), var(--accent-soft) 55%, var(--line-2) 100%);
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 7px), #000 calc(100% - 6px));
  mask: radial-gradient(farthest-side, transparent calc(100% - 7px), #000 calc(100% - 6px));
}

.ring-label {
  position: relative;
  z-index: 1;              /* .ring 是绝对定位，会盖住文字，必须抬一层 */
  display: grid;
  place-items: center;
  text-align: center;
  line-height: 1.1;
}
.ring-label strong {
  font-size: 1.65rem;
  font-weight: 750;
  letter-spacing: -.04em;
  font-variant-numeric: tabular-nums;
}
.ring-label span {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.hero-main { min-width: 0; flex: 1 1 14rem; }

.portal-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem;
  margin: 0 0 .5rem;
}
.portal-title {
  font-size: 1.3rem;
  margin: 0;
  overflow-wrap: anywhere;
  letter-spacing: -.028em;
}

.hero-usage {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .45rem;
  margin: 0 0 .3rem;
  font-variant-numeric: tabular-nums;
}
.hero-usage strong {
  font-size: 1.5rem;
  font-weight: 720;
  letter-spacing: -.03em;
}
.hero-usage span { color: var(--ink-dim); font-size: 15px; }
.portal-hero .bar { margin: .7rem 0 0; max-width: 26rem; }

.portal-sub .copy-field { font-weight: 600; }
.portal-foot {
  margin: 1.35rem 0 0;
  text-align: center;
  color: var(--ink-faint);
  font-size: 13.5px;
}

/* 15. 桌面布局 =========================================================== */
@media (min-width: 960px) {
  /* 左侧固定侧边栏：品牌 + 导航 + 退出，占满视口高度 */
  .page-admin .sidenav {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 40;                     /* 高于 .topbar(30)，否则顶栏的毛玻璃盖住品牌 */
    width: 16rem;
    display: flex;
    flex-direction: column;
    margin: 0;
    padding: 1.1rem .9rem;
    background: var(--card);                               /* fallback */
    background: color-mix(in srgb, var(--card) 55%, transparent);
    border-right: 1px solid var(--line);
    -webkit-backdrop-filter: blur(20px) saturate(130%);
    backdrop-filter: blur(20px) saturate(130%);
    overflow-y: auto;
  }

  .sidenav-brand {
    display: flex;
    align-items: center;
    gap: .6rem;
    padding: .25rem .5rem 1.25rem;
    font-weight: 700;
    font-size: 1.02rem;
    letter-spacing: -.015em;
    color: var(--ink);
  }
  .sidenav-brand .brand-dim { font-weight: 500; }

  /* 桌面端品牌在侧栏，顶栏只留用户信息 */
  .page-admin .topbar { padding-left: 16rem; }
  .page-admin .topbar .brand { display: none; }
  .page-admin .topbar {
    justify-content: flex-end;
    padding-right: max(2rem, calc((100vw - 16rem - 1180px) / 2 + 2rem));
  }

  .page-admin .nav-list {
    flex-direction: column;
    gap: .2rem;
    padding: 0;
    overflow: visible;
  }
  .nav-link {
    padding: .6rem .8rem;
    font-size: 14.5px;
  }
  .nav-link[aria-current="page"]::before {
    content: "";
    position: absolute;
    left: -.55rem;
    top: 50%;
    width: 3px;
    height: 1.35rem;
    margin-top: -.675rem;
    border-radius: var(--pill);
    background: var(--grad);
  }

  .logout-form {
    margin-top: auto;
    padding: .9rem 0 0;
    border-top: 1px solid var(--line);
  }

  .page-admin .shell {
    margin-left: 16rem;
    padding: 1.5rem 2rem 2rem;
  }
  .page-admin .site-foot { margin-left: 16rem; }

  .stat-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .9rem; }

  /* 两列底部对齐：每列最后一张卡撑满该列剩余高度，避免右下角出现锯齿状空白 */
  .cols > .stack-gap {
    align-self: stretch;
    height: 100%;
    grid-template-rows: min-content 1fr;
  }
  .cols { grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); gap: 1.1rem; }
  .danger-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .qr-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .kv-wide { grid-template-columns: 10rem 1fr; }

  .page-title { font-size: 1.75rem; }
  .stat-value { font-size: 1.85rem; }
  .card { padding: 1.25rem 1.35rem; }
  .portal-hero { padding: 1.5rem; gap: 1.75rem; }
  .ring-wrap { width: 138px; height: 138px; }
}

@media (min-width: 1180px) {
  .cols { grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); }
  .danger-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

  /* 用户表单：左列「基本信息」整列，右列「配额与到期 / 速率与并发」上下叠 */
  .page-admin form.stack-gap {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 1rem;
    align-items: start;
  }
  .page-admin form.stack-gap > section.card:nth-of-type(1) {
    grid-column: 1;
    grid-row: 1 / span 2;
    align-self: stretch;          /* 与右列等高，避免左下角出现空洞 */
  }
  .page-admin form.stack-gap > section.card:nth-of-type(2) { grid-column: 2; grid-row: 1; }
  .page-admin form.stack-gap > section.card:nth-of-type(3) { grid-column: 2; grid-row: 2; }
  .page-admin form.stack-gap > .form-actions { grid-column: 1 / -1; }
}

/* 16. 动效 =============================================================== */
@keyframes rise {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.card,
.stat,
.table-wrap,
.portal-hero,
.auth-card,
.error-card,
.page-head { animation: rise .32s cubic-bezier(.22, .68, .36, 1) both; }

.stat:nth-child(2) { animation-delay: .04s; }
.stat:nth-child(3) { animation-delay: .08s; }
.stat:nth-child(4) { animation-delay: .12s; }

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
    animation-delay: 0ms !important;
  }
}