/* 统一账号 · 视觉方向：医疗仪器操作面板
   深夜蓝底 + 青碧光 + 精密网格 + 等宽数字。
   不引任何外部字体或 CDN：中文字体走系统栈，数字与标签走等宽，
   以字重、字距与字号对比制造层次，避免"白底卡片 + 紫色渐变"的通用观感。 */

:root {
  --bg:        #060A12;
  --bg-2:      #0B1322;
  --panel:     rgba(13, 22, 38, 0.78);
  --line:      rgba(120, 200, 220, 0.14);
  --line-soft: rgba(120, 200, 220, 0.07);
  --ink:       #E9F2F6;
  --ink-dim:   #8CA0AF;
  --ink-faint: #5A6B78;
  --accent:    #35E0C4;
  --accent-2:  #4C8DFF;
  --danger:    #FF6B6B;
  --warn:      #FFB347;
  --ok:        #35E0C4;

  --sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Consolas,
          "Liberation Mono", monospace;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.7 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---------- 背景：光晕 + 网格 + 颗粒 ---------- */

body::before {
  content: "";
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(880px 620px at 12% -8%,  rgba(53, 224, 196, 0.13), transparent 62%),
    radial-gradient(760px 560px at 92% 8%,   rgba(76, 141, 255, 0.12), transparent 60%),
    radial-gradient(900px 700px at 50% 112%, rgba(53, 224, 196, 0.06), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}

.grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg,   var(--line-soft) 0 1px, transparent 1px 56px),
    repeating-linear-gradient(90deg,  var(--line-soft) 0 1px, transparent 1px 56px);
  mask-image: radial-gradient(circle at 30% 20%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 30% 20%, #000 0%, transparent 78%);
}

.grain {
  position: fixed; inset: 0; z-index: 1; pointer-events: none; opacity: 0.32;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

/* ---------- 布局 ---------- */

.shell {
  position: relative; z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(32px, 6vw, 96px);
  align-items: center;
  width: min(1180px, 92vw);
  min-height: 100vh;
  margin: 0 auto;
  padding: clamp(40px, 7vh, 88px) 0;
}

/* ---------- 品牌侧 ---------- */

.brand { animation: rise 0.85s var(--ease) both; }

.brand-mark { display: flex; align-items: center; gap: 12px; }

.mark-line {
  width: 34px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 18px rgba(53, 224, 196, 0.55);
}

.mark-text {
  font: 500 12.5px/1 var(--mono);
  letter-spacing: 0.22em;
  color: var(--accent);
  text-transform: uppercase;
}

.brand h1 {
  margin: clamp(20px, 3.4vh, 34px) 0 0;
  font-size: clamp(46px, 7.2vw, 82px);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.035em;
  background: linear-gradient(160deg, #FFFFFF 6%, #A9C6D4 58%, #6E8B9C 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

.tagline {
  margin: 22px 0 0;
  max-width: 30em;
  color: var(--ink-dim);
  font-size: 15.5px;
}

/* 仪器读数块 */
.readout {
  margin: clamp(28px, 4.4vh, 44px) 0 0;
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  background: linear-gradient(180deg, rgba(11, 19, 34, 0.7), rgba(11, 19, 34, 0.32));
  backdrop-filter: blur(6px);
  padding: 6px 18px;
  animation: rise 0.85s var(--ease) 0.12s both;
}

.readout-row {
  display: flex; align-items: baseline; justify-content: space-between; gap: 20px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line-soft);
}
.readout-row:last-child { border-bottom: 0; }

.readout .lbl {
  font: 400 12px/1 var(--mono); letter-spacing: 0.14em;
  color: var(--ink-faint); text-transform: uppercase;
}
.readout .val {
  font: 500 13.5px/1 var(--mono); letter-spacing: 0.02em;
  color: var(--ink); font-variant-numeric: tabular-nums;
}
.readout .val.is-ok   { color: var(--ok); }
.readout .val.is-bad  { color: var(--danger); }
.readout .val.is-warn { color: var(--warn); }

.facts {
  margin: clamp(26px, 4vh, 38px) 0 0;
  padding: 0; list-style: none;
  display: grid; gap: 11px;
  max-width: 34em;
}
.facts li {
  position: relative;
  padding-left: 22px;
  color: var(--ink-dim);
  font-size: 14px;
}
.facts li::before {
  content: ""; position: absolute; left: 4px; top: 0.68em;
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 10px rgba(53, 224, 196, 0.7);
}

/* ---------- 表单面板 ---------- */

.panel {
  position: relative;
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(14px);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.04) inset,
    0 40px 90px -50px rgba(0, 0, 0, 0.95);
  animation: rise 0.85s var(--ease) 0.06s both;
}

.panel::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.55;
}

.panel-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 26px;
  border-bottom: 1px solid var(--line-soft);
}

.tabs { display: flex; gap: 26px; }

.tab {
  position: relative;
  appearance: none; border: 0; background: none; cursor: pointer;
  padding: 20px 0 17px;
  color: var(--ink-faint);
  font: 500 15px/1 var(--sans);
  letter-spacing: 0.01em;
  transition: color 0.3s var(--ease);
}
.tab:hover { color: var(--ink-dim); }
.tab.is-on { color: var(--ink); }
.tab.is-on::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 14px rgba(53, 224, 196, 0.6);
  animation: sweep 0.45s var(--ease) both;
}

.pulse {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 12px rgba(53, 224, 196, 0.9);
  animation: breathe 2.6s ease-in-out infinite;
}

/* ---------- 字段 ---------- */

.form { padding: 26px; display: grid; gap: 18px; }
.form.is-hidden { display: none; }

.field { display: grid; gap: 8px; }
.field-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.field-lbl {
  font: 400 11.5px/1 var(--mono);
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--ink-faint);
}
.field-lbl em {
  font-style: normal; margin-left: 6px;
  color: var(--accent); letter-spacing: 0.08em;
}
.field-lbl em.opt { color: var(--ink-faint); }

.field input {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(4, 8, 15, 0.6);
  color: var(--ink);
  font: 400 15px/1.2 var(--sans);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease);
}
.field input::placeholder { color: #45535F; }
.field input:hover { border-color: rgba(120, 200, 220, 0.26); }
.field input:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(4, 8, 15, 0.85);
  box-shadow: 0 0 0 3px rgba(53, 224, 196, 0.13);
}
.field input.is-bad { border-color: var(--danger); box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.12); }

/* ---------- 按钮 ---------- */

.submit {
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: space-between; gap: 14px;
  width: 100%; margin-top: 4px;
  padding: 15px 18px;
  border: 1px solid rgba(53, 224, 196, 0.42);
  border-radius: 2px; cursor: pointer;
  background: linear-gradient(100deg, rgba(53, 224, 196, 0.16), rgba(76, 141, 255, 0.13));
  color: var(--ink);
  font: 500 15px/1 var(--sans); letter-spacing: 0.02em;
  transition: transform 0.2s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.submit svg {
  width: 19px; height: 19px; flex: none;
  fill: none; stroke: var(--accent); stroke-width: 1.7;
  stroke-linecap: round; stroke-linejoin: round;
  transition: transform 0.3s var(--ease);
}
.submit::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, transparent 20%, rgba(53, 224, 196, 0.22) 50%, transparent 80%);
  transform: translateX(-110%);
  transition: transform 0.62s var(--ease);
}
.submit:hover { border-color: var(--accent); box-shadow: 0 0 28px -6px rgba(53, 224, 196, 0.5); }
.submit:hover::after { transform: translateX(110%); }
.submit:hover svg { transform: translateX(4px); }
.submit:active { transform: translateY(1px); }
.submit[disabled] { opacity: 0.55; cursor: progress; }

.submit.ghost {
  background: none;
  border-color: var(--line);
  justify-content: center;
  color: var(--ink-dim);
}
.submit.ghost:hover { border-color: rgba(120, 200, 220, 0.34); color: var(--ink); box-shadow: none; }
.submit.ghost svg { display: none; }

.hint { margin: 2px 0 0; color: var(--ink-faint); font-size: 12.5px; }

/* ---------- 已登录视图 ---------- */

.who { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.who-name { font-size: 22px; font-weight: 600; letter-spacing: -0.01em; }
.who-badge {
  padding: 4px 10px; border: 1px solid rgba(53, 224, 196, 0.4); border-radius: 999px;
  font: 500 11px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent);
}

.kv {
  margin: 4px 0 0; display: grid; grid-template-columns: auto 1fr; gap: 9px 20px;
  border-top: 1px dashed var(--line-soft); padding-top: 16px;
}
.kv dt {
  font: 400 11.5px/1.7 var(--mono); letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-faint);
}
.kv dd {
  margin: 0; font: 400 14px/1.7 var(--mono); color: var(--ink);
  font-variant-numeric: tabular-nums; word-break: break-all;
}
.kv dd.empty { color: var(--ink-faint); }

.rotate { border-top: 1px dashed var(--line-soft); padding-top: 6px; }
.rotate summary {
  cursor: pointer; padding: 12px 0; list-style: none;
  font: 500 14px/1 var(--sans); color: var(--ink-dim);
  transition: color 0.2s var(--ease);
}
.rotate summary::-webkit-details-marker { display: none; }
.rotate summary::before { content: "+ "; color: var(--accent); font-family: var(--mono); }
.rotate[open] summary::before { content: "− "; }
.rotate summary:hover { color: var(--ink); }
.rotate form { display: grid; gap: 14px; padding: 6px 0 10px; }

/* ---------- 提示 ---------- */

.toast {
  margin: 0 26px 24px;
  padding: 0 14px;
  max-height: 0; overflow: hidden;
  border-left: 2px solid transparent;
  font-size: 14px;
  opacity: 0;
  transition: all 0.35s var(--ease);
}
.toast.is-on { max-height: 140px; padding: 12px 14px; opacity: 1; }
.toast.err  { border-color: var(--danger); background: rgba(255, 107, 107, 0.08); color: #FFD3D3; }
.toast.ok   { border-color: var(--accent); background: rgba(53, 224, 196, 0.08); color: #B9F5EA; }

/* ---------- 测试账号 ---------- */

/* 跨两列铺在品牌与表单之下；未开启时不占位（.is-hidden） */
.demo {
  grid-column: 1 / -1;
  border: 1px solid var(--line);
  border-top-color: rgba(53, 224, 196, 0.3);
  background: linear-gradient(180deg, rgba(11, 19, 34, 0.62), rgba(11, 19, 34, 0.3));
  backdrop-filter: blur(8px);
  padding: 20px 26px 22px;
  animation: rise 0.85s var(--ease) 0.18s both;
}
.demo.is-hidden { display: none; }

.demo-head { display: flex; align-items: baseline; gap: 8px 18px; flex-wrap: wrap; }
.demo-head h2 {
  margin: 0;
  font: 500 12px/1 var(--mono); letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--accent);
}
.demo-head p { margin: 0; color: var(--ink-faint); font-size: 12.5px; }

.demo-list {
  margin: 16px 0 0; padding: 0; list-style: none;
  display: flex; flex-wrap: wrap; gap: 10px;
}

.demo-item {
  appearance: none; cursor: pointer;
  display: inline-flex; align-items: center; gap: 14px;
  padding: 10px 15px;
  border: 1px solid var(--line); border-radius: 2px;
  background: rgba(4, 8, 15, 0.55);
  color: var(--ink);
  text-align: left;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.demo-item:hover {
  border-color: rgba(53, 224, 196, 0.55);
  background: rgba(4, 8, 15, 0.8);
  box-shadow: 0 0 24px -8px rgba(53, 224, 196, 0.5);
}
.demo-item:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.demo-user {
  font: 500 14px/1 var(--mono); letter-spacing: 0.02em; color: var(--ink);
}
.demo-pass {
  font: 400 13px/1 var(--mono); color: var(--ink-dim);
  padding-left: 14px; border-left: 1px dashed var(--line);
}
.demo-role {
  font: 400 10.5px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink-faint);
  padding: 4px 8px; border: 1px solid var(--line-soft); border-radius: 999px;
}
.demo-act {
  font: 400 11.5px/1 var(--mono); letter-spacing: 0.12em;
  color: var(--accent); opacity: 0.5;
  transition: opacity 0.25s var(--ease);
}
.demo-item:hover .demo-act, .demo-item:focus-visible .demo-act { opacity: 1; }

/* ---------- 页脚 ---------- */

.foot {
  position: relative; z-index: 2;
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  width: min(1180px, 92vw); margin: 0 auto; padding: 0 0 34px;
  font: 400 12px/1.6 var(--mono); letter-spacing: 0.05em; color: var(--ink-faint);
}

/* ---------- 动效 ---------- */

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: none; }
}
@keyframes sweep {
  from { transform: scaleX(0); transform-origin: left; }
  to   { transform: scaleX(1); transform-origin: left; }
}
@keyframes breathe {
  0%, 100% { opacity: 1;   transform: scale(1); }
  50%      { opacity: 0.45; transform: scale(0.82); }
}

/* ---------- 响应式 ---------- */

@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; min-height: auto; padding: 40px 0; gap: 34px; }
  .brand h1 { font-size: clamp(40px, 12vw, 58px); }
  .facts { display: none; }
  .foot { flex-direction: column; gap: 6px; padding-bottom: 26px; }
  .field-pair { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}