/* ==========================================================================
   云间手记 · 后台（登录 + 管理端）
   参照：紫→洋红渐变背景 / 白色悬浮卡 / 彩色功能图标 / 中等圆角 / 同色系淡阴影
   ========================================================================== */

:root {
  --ink: #171923;
  --ink-2: #4d5468;
  --ink-3: #8a90a6;
  --ink-4: #b3b8c9;

  --brand-1: #4a6cf7;
  --brand-2: #8a3ffc;
  --brand-3: #d87093;
  --brand-soft: rgba(74, 108, 247, .08);

  --bg: #f6f7fc;
  --card: #ffffff;
  --line: rgba(74, 108, 247, .10);
  --line-2: rgba(74, 108, 247, .18);

  --sh-sm: 0 2px 8px rgba(74, 108, 247, .06);
  --sh-md: 0 10px 28px rgba(74, 108, 247, .10);
  --sh-lg: 0 20px 48px rgba(74, 108, 247, .16);
  --sh-brand: 0 12px 26px rgba(122, 76, 250, .30);

  --r-xl: 24px;
  --r-lg: 18px;
  --r-md: 14px;
  --r-sm: 12px;

  --side-w: 232px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --font: "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB", "Microsoft YaHei",
          system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", Consolas, monospace;
}

* { box-sizing: border-box; }
html { height: auto; overflow-x: hidden; }
body { min-height: 100%; overflow-x: hidden; max-width: 100vw; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font-family: inherit; }
::selection { background: rgba(138, 63, 252, .18); }

/* ============================================================ 登录页 */
body.login-page {
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(900px 600px at 12% 8%, rgba(91, 76, 196, .95), transparent 62%),
    radial-gradient(900px 700px at 88% 18%, rgba(164, 91, 216, .92), transparent 60%),
    radial-gradient(1000px 700px at 72% 100%, rgba(216, 112, 147, .88), transparent 62%),
    linear-gradient(135deg, #4c3fb8 0%, #7b46d6 46%, #cf6b92 100%);
  min-height: 100vh;
  min-height: 100dvh;
  position: relative;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: max(24px, env(safe-area-inset-bottom));
}
body.login-page::before,
body.login-page::after {
  content: "";
  position: fixed;
  border-radius: 50%;
  filter: blur(70px);
  pointer-events: none;
}
body.login-page::before {
  width: 520px; height: 520px; top: -160px; left: -120px;
  background: radial-gradient(circle, rgba(255,255,255,.22), transparent 68%);
}
body.login-page::after {
  width: 620px; height: 620px; bottom: -260px; right: -180px;
  background: radial-gradient(circle, rgba(255,255,255,.14), transparent 66%);
}

.login-shell {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1120px;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  gap: 56px;
  align-items: center;
  padding: 40px 12px;
}

.login-brand { color: #fff; }
.login-brand .logo {
  width: 62px; height: 62px;
  border-radius: 18px;
  display: grid; place-items: center;
  font-size: 26px; font-weight: 700;
  background: rgba(255, 255, 255, .20);
  border: 1px solid rgba(255, 255, 255, .45);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.6), 0 16px 32px rgba(30, 16, 70, .26);
  backdrop-filter: blur(6px);
}
.login-brand h1 {
  margin: 26px 0 10px;
  font-size: clamp(30px, 3vw, 42px);
  letter-spacing: -.8px;
  line-height: 1.2;
  font-weight: 750;
}
.login-brand .en {
  font-size: 15px;
  letter-spacing: 3.4px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .72);
}
.login-brand p.desc {
  margin: 20px 0 0;
  max-width: 42ch;
  font-size: 14.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .82);
}

.feats { display: flex; gap: 22px; margin-top: 44px; flex-wrap: wrap; }
.feat { text-align: center; width: 92px; }
.feat .fi {
  width: 56px; height: 56px;
  margin: 0 auto 10px;
  border-radius: 16px;
  display: grid; place-items: center;
  font-size: 22px;
  color: #fff;
  box-shadow: 0 12px 24px rgba(20, 10, 60, .24);
}
.feat span { font-size: 12.5px; color: rgba(255, 255, 255, .88); }
.feat.f1 .fi { background: linear-gradient(140deg, #2ec4b6, #29b6f6); }
.feat.f2 .fi { background: linear-gradient(140deg, #ff9f1c, #ffb74d); }
.feat.f3 .fi { background: linear-gradient(140deg, #7b5cff, #b06bff); }

.login-card {
  background: #fff;
  border-radius: 26px;
  padding: 40px 38px 34px;
  box-shadow: 0 30px 70px rgba(38, 20, 96, .30), inset 0 -2px 8px rgba(255,255,255,.5);
}
.login-card .hi {
  width: 52px; height: 52px;
  border-radius: 16px;
  display: grid; place-items: center;
  font-size: 24px;
  background: linear-gradient(140deg, rgba(74,108,247,.14), rgba(138,63,252,.12));
  border: 1px solid var(--line);
  margin-bottom: 16px;
}
.login-card h2 { margin: 0 0 6px; font-size: 25px; letter-spacing: -.4px; }
.login-card .sub { margin: 0 0 26px; font-size: 13.5px; color: var(--ink-3); }

.field { position: relative; margin-bottom: 14px; }
.field .ic {
  position: absolute; left: 15px; top: 50%; transform: translateY(-50%);
  font-size: 15px; color: var(--ink-4);
}
.field input {
  width: 100%;
  height: 50px;
  padding: 0 16px 0 44px;
  border-radius: 13px;
  border: 1px solid #e4e7f2;
  background: #fbfcff;
  font-size: 14.5px;
  color: var(--ink);
  outline: none;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}
.field input::placeholder { color: #a8adc0; }
.field input:focus {
  border-color: var(--brand-2);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(138, 63, 252, .12);
}

.login-row { display: flex; align-items: center; gap: 10px; margin: 4px 0 20px; font-size: 13px; color: var(--ink-3); }
.login-row label { display: flex; align-items: center; gap: 7px; cursor: pointer; }
.login-row input[type=checkbox] { accent-color: #7b5cff; width: 15px; height: 15px; }
.login-row a { margin-left: auto; color: var(--brand-1); }

.btn-primary {
  width: 100%;
  height: 52px;
  border: 0;
  border-radius: 13px;
  color: #fff;
  font-size: 15.5px;
  font-weight: 650;
  letter-spacing: .4px;
  cursor: pointer;
  background: linear-gradient(120deg, #4a6cf7, #8a3ffc);
  box-shadow: 0 14px 28px rgba(122, 76, 250, .32);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 34px rgba(122, 76, 250, .38); }
.btn-primary:active { transform: translateY(0); }

.login-foot { margin-top: 20px; text-align: center; font-size: 12px; color: var(--ink-4); }

/* ============================================================ 管理端骨架 */
.app { display: grid; grid-template-columns: var(--side-w) minmax(0, 1fr); min-height: 100vh; min-height: 100dvh; }

.side {
  position: sticky; top: 0;
  height: 100vh;
  padding: 20px 14px;
  background: #fff;
  border-right: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 18px;
  z-index: 40;
}
.side .brand { display: flex; align-items: center; gap: 11px; padding: 4px 8px 14px; }
.side .brand .mk {
  width: 40px; height: 40px; border-radius: 13px;
  display: grid; place-items: center;
  color: #fff; font-weight: 700; font-size: 17px;
  background: linear-gradient(140deg, var(--brand-1), var(--brand-2) 62%, var(--brand-3));
  box-shadow: var(--sh-brand);
}
.side .brand b { font-size: 15px; letter-spacing: .2px; display: block; }
.side .brand small { font-size: 10.5px; letter-spacing: 1.6px; color: var(--ink-3); text-transform: uppercase; }

.side nav { display: grid; gap: 4px; overflow-y: auto; }
.side nav a {
  display: flex; align-items: center; gap: 11px;
  padding: 8px 10px;
  border-radius: 12px;
  font-size: 14px;
  color: var(--ink-2);
  transition: background .2s var(--ease), color .2s var(--ease);
}
.side nav a .ic {
  width: 34px; height: 34px; flex: none;
  border-radius: 11px;
  display: grid; place-items: center;
  font-size: 15px; color: #fff;
  box-shadow: 0 6px 14px rgba(30, 40, 90, .14);
}
.side nav a:hover { background: var(--bg); color: var(--ink); }
.side nav a.on {
  background: linear-gradient(100deg, rgba(74,108,247,.12), rgba(138,63,252,.09));
  color: var(--ink); font-weight: 600;
  box-shadow: inset 0 0 0 1px var(--line-2);
}
.side nav a .n { margin-left: auto; font-size: 11.5px; color: var(--ink-3); }

.i-home { background: linear-gradient(140deg, #4a6cf7, #7b5cff); }
.i-post { background: linear-gradient(140deg, #29b6f6, #4fc3f7); }
.i-tag  { background: linear-gradient(140deg, #8a3ffc, #b06bff); }
.i-media{ background: linear-gradient(140deg, #43a047, #81c784); }
.i-cmt  { background: linear-gradient(140deg, #fb8c00, #ffb74d); }
.i-sub  { background: linear-gradient(140deg, #d87093, #ef9a9a); }
.i-stat { background: linear-gradient(140deg, #00bcd4, #4dd0e1); }
.i-set  { background: linear-gradient(140deg, #7e57c2, #b39ddb); }

.side .side-foot { margin-top: auto; display: grid; gap: 10px; }
.side .me {
  display: flex; align-items: center; gap: 10px;
  padding: 10px;
  border-radius: 14px;
  background: var(--bg);
  border: 1px solid var(--line);
}
.side .me .av {
  width: 34px; height: 34px; border-radius: 11px; flex: none;
  display: grid; place-items: center; color: #fff; font-size: 14px; font-weight: 700;
  background: linear-gradient(140deg, var(--brand-1), var(--brand-2));
}
.side .me b { font-size: 13px; }
.side .me small { display: block; font-size: 11px; color: var(--ink-3); }

/* 顶栏 */
.main { min-width: 0; display: flex; flex-direction: column; }
.top {
  height: 62px;
  padding: 0 26px;
  display: flex; align-items: center; gap: 14px;
  background: rgba(255, 255, 255, .78);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 30;
}
.top .crumb { font-size: 12.5px; color: var(--ink-3); display: flex; gap: 8px; align-items: center; }
.top .crumb b { color: var(--ink); font-weight: 600; }
.top .spacer { flex: 1; }
.top .user { font: inherit; cursor: pointer; }
.top button.user {
  display: flex; align-items: center; gap: 9px;
  padding: 5px 8px 5px 6px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 13px; color: var(--ink-2);
  cursor: pointer;
}
.top .user .av {
  width: 28px; height: 28px; border-radius: 9px;
  display: grid; place-items: center; color: #fff; font-size: 12.5px; font-weight: 700;
  background: linear-gradient(140deg, var(--brand-1), var(--brand-2));
}
.top .menu-btn {
  display: none;
  width: 38px; height: 38px; border-radius: 11px;
  border: 1px solid var(--line); background: #fff; color: var(--ink-2);
  font-size: 16px; cursor: pointer;
}

.content { padding: 22px 26px 44px; }

/* KPI */
.kpi-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(226px, 1fr)); gap: 16px; }
.kpi {
  position: relative; overflow: hidden;
  border-radius: var(--r-lg);
  padding: 18px 20px;
  color: #fff;
  box-shadow: var(--sh-md);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.kpi:hover { transform: translateY(-3px); box-shadow: var(--sh-lg); }
.kpi::after {
  content: ""; position: absolute; right: -26px; top: -30px;
  width: 110px; height: 110px; border-radius: 50%;
  background: rgba(255,255,255,.16);
}
.kpi .row { display: flex; align-items: center; gap: 8px; font-size: 12.5px; opacity: .95; }
.kpi .row .ic { font-size: 15px; }
.kpi .num { font-size: 30px; font-weight: 750; letter-spacing: -.8px; margin: 8px 0 2px; }
.kpi .foot { font-size: 12px; opacity: .9; }
.kpi .trend {
  margin-left: auto; font-size: 11.5px; padding: 2px 8px; border-radius: 999px;
  background: rgba(255,255,255,.22);
}
.kpi.k1 { background: linear-gradient(135deg, #29b6f6, #4fc3f7); }
.kpi.k2 { background: linear-gradient(135deg, #4caf50, #81c784); }
.kpi.k3 { background: linear-gradient(135deg, #ffa726, #ffb74d); }

/* 卡片 */
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-sm);
  padding: 18px 20px;
}
.panel-head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.panel-head h3 { margin: 0; font-size: 15px; letter-spacing: .2px; }
.panel-head .tag-soft {
  margin-left: auto;
  font-size: 11.5px; color: var(--brand-1);
  background: var(--brand-soft);
  border: 1px solid var(--line-2);
  padding: 3px 10px; border-radius: 999px;
}
.charts { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 16px; margin-top: 16px; }

.legend { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 12px; font-size: 12.5px; color: var(--ink-2); }
.legend i { width: 9px; height: 9px; border-radius: 3px; display: inline-block; margin-right: 6px; }

/* 表格 */
.table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.table th {
  text-align: left; font-weight: 600; color: var(--ink-3);
  font-size: 12px; letter-spacing: .4px;
  padding: 10px 12px; border-bottom: 1px solid var(--line);
}
.table td { padding: 12px; border-bottom: 1px solid rgba(74,108,247,.06); color: var(--ink-2); }
.table tr:hover td { background: rgba(74,108,247,.03); }
.table b { color: var(--ink); font-weight: 600; }
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11.5px; padding: 3px 10px; border-radius: 999px;
  background: var(--brand-soft); color: var(--brand-1);
  border: 1px solid var(--line-2);
}
.pill.ok { background: rgba(76,175,80,.10); color: #2e7d32; border-color: rgba(76,175,80,.22); }
.pill.warn { background: rgba(255,167,38,.12); color: #b45309; border-color: rgba(255,167,38,.24); }

.actions { display: flex; gap: 8px; }
.btn-sm {
  font-size: 12.5px; padding: 7px 13px; border-radius: 10px;
  border: 1px solid var(--line-2); background: #fff; color: var(--ink-2);
  cursor: pointer; transition: all .18s var(--ease);
}
.btn-sm:hover { border-color: var(--brand-2); color: var(--brand-2); box-shadow: var(--sh-sm); }
.btn-sm.primary {
  border: 0; color: #fff;
  background: linear-gradient(120deg, var(--brand-1), var(--brand-2));
  box-shadow: var(--sh-brand);
}

.page-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.page-head h2 { margin: 0; font-size: 19px; letter-spacing: -.2px; }
.page-head .sub { font-size: 12.5px; color: var(--ink-3); }
.page-head .right { margin-left: auto; display: flex; gap: 8px; }

/* 响应式 */
@media (max-width: 1100px) {
  .charts { grid-template-columns: 1fr; }
  .kpi-row { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  /* 内容比屏幕高时，grid 居中会把顶部顶出视口且滚不到，改成从顶部开始 */
  body.login-page { align-items: start; }
  .login-shell { grid-template-columns: 1fr; gap: 26px; padding: 24px 0 40px; }
  .login-brand { text-align: center; }
  .login-brand .logo { margin: 0 auto; }
  .login-brand p.desc { margin-left: auto; margin-right: auto; }
  .feats { justify-content: center; gap: 16px; margin-top: 28px; }
  .login-card { padding: 30px 24px 26px; border-radius: 22px; }

  .app { grid-template-columns: 1fr; }
  .side {
    position: fixed; inset: 0 auto 0 0; width: 258px;
    transform: translateX(-100%);
    transition: transform .28s var(--ease);
    box-shadow: 0 24px 60px rgba(20,20,40,.24);
  }
  .side.open { transform: none; }
  .top { padding: 0 16px; }
  .top .menu-btn { display: grid; place-items: center; }
  .top .crumb { display: none; }
  .content { padding: 16px 16px 40px; }
  .kpi-row { grid-template-columns: 1fr; gap: 12px; }
  .kpi .num { font-size: 26px; }
  .panel { padding: 16px; }
  .table thead { display: none; }
  .table tr { display: grid; gap: 4px; padding: 12px 0; border-bottom: 1px solid var(--line); }
  .table td { padding: 2px 0; border: 0; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* 搜索框 / toast */
.search {
  height: 34px; padding: 0 12px; border-radius: 10px;
  border: 1px solid var(--line-2); background: #fff; color: var(--ink);
  font-size: 13px; outline: none; transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.search:focus { border-color: var(--brand-2); box-shadow: 0 0 0 3px rgba(138,63,252,.12); }
#toast {
  position: fixed; left: 50%; bottom: 34px; transform: translate(-50%, 20px);
  background: #171923; color: #fff; font-size: 13.5px;
  padding: 11px 20px; border-radius: 12px; box-shadow: 0 16px 36px rgba(20,20,40,.28);
  opacity: 0; pointer-events: none; transition: all .25s var(--ease); z-index: 99;
}
#toast.show { opacity: 1; transform: translate(-50%, 0); }
#toast.bad { background: #a3286b; }

/* KPI 进度条（系统实时指标） */
.kpi .num { display: flex; align-items: baseline; gap: 2px; }
.kpi .num .unit { font-size: 15px; font-weight: 600; opacity: .85; margin-left: 1px; }
.kbar { height: 6px; border-radius: 99px; background: rgba(255,255,255,.28); margin: 10px 0 8px; overflow: hidden; }
.kbar i { display: block; height: 100%; border-radius: 99px; background: rgba(255,255,255,.92);
  transition: width .6s cubic-bezier(.22,.61,.36,1), background .3s; }

/* 第四张卡（网络）与 CPU 温度副行 */
.kpi.k4 { background: linear-gradient(135deg, #5b46e8, #8a3ffc 55%, #b06bff);
  grid-column: 1 / -1; display: grid; grid-template-columns: 250px minmax(0, 1fr);
  gap: 20px; align-items: center; }
.kpi.k4 .net-left .num { margin-bottom: 2px; }
.kpi.k4 .net-right { min-width: 0; }
.kpi .sub-foot { font-size: 11.5px; margin-top: 4px; color: rgba(255,255,255,.82); }

/* 网络波形 */
.kwave { display: block; width: 100%; height: 86px; margin: 2px 0 6px; border-radius: 10px;
  background: rgba(255,255,255,.10); }
.wave-legend { display: flex; gap: 12px; font-size: 11px; color: rgba(255,255,255,.85); margin-bottom: 4px; }
.wave-legend i { display: inline-block; width: 8px; height: 3px; border-radius: 2px; margin-right: 5px; vertical-align: middle; }

@media (max-width: 900px) {
  .kpi.k4 { grid-template-columns: 1fr; gap: 10px; }
  .kwave { height: 70px; }
}

/* 弹窗 */
.modal-mask { position: fixed; inset: 0; background: rgba(22,20,40,.42); backdrop-filter: blur(3px);
  display: none; place-items: center; z-index: 120; padding: 20px; }
.modal-mask.on { display: grid; }
.modal { width: 100%; max-width: 460px; background: #fff; border-radius: 20px; padding: 24px 24px 18px;
  box-shadow: 0 30px 70px rgba(20,16,50,.35); }
.modal h3 { margin: 0 0 16px; font-size: 17px; }
.modal .field-sm label { font-size: 12.5px; color: var(--ink-3); display: block; margin-bottom: 6px; }
.modal .field-sm input { width: 100%; padding: 10px 12px; border-radius: 11px; border: 1px solid #e4e7f2;
  background: #fbfcff; font-size: 13.5px; outline: none; font-family: inherit; color: var(--ink); }
.modal .field-sm input:focus { border-color: var(--brand-2); box-shadow: 0 0 0 3px rgba(138,63,252,.12); background: #fff; }
.modal-foot { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }