/* ============================================================
   工具台 TOOLBENCH — 工程面板风格
   ============================================================ */

:root {
  --bg: #eef1f4;
  --panel: #ffffff;
  --panel-2: #f7f9fa;
  --ink: #14181d;
  --ink-2: #5a6472;
  --ink-3: #8b95a3;
  --line: #dfe4e9;
  --line-strong: #c8d0d8;
  --accent: #0f766e;
  --accent-strong: #0b5c55;
  --accent-soft: #e2f2ef;
  --accent-ink: #0b5c55;
  --danger: #c0392b;
  --danger-soft: #fdecea;
  --ok: #1e8e5a;
  --warn: #b26a00;
  --shadow: 0 1px 2px rgba(20, 24, 29, .05), 0 4px 16px rgba(20, 24, 29, .06);
  --radius: 8px;
  --mono: ui-monospace, "Cascadia Code", "JetBrains Mono", Consolas, "SF Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

[data-theme="dark"] {
  --bg: #0b0e11;
  --panel: #13171c;
  --panel-2: #181d23;
  --ink: #e7ebef;
  --ink-2: #99a3af;
  --ink-3: #6b7682;
  --line: #242b33;
  --line-strong: #333c46;
  --accent: #2dd4bf;
  --accent-strong: #5eead4;
  --accent-soft: #10302d;
  --accent-ink: #5eead4;
  --danger: #f0857a;
  --danger-soft: #3a1f1c;
  --ok: #4ade80;
  --warn: #fbbf24;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 6px 20px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

svg { width: 1em; height: 1em; display: block; }
::selection { background: var(--accent); color: #fff; }
[data-theme="dark"] ::selection { color: #06231f; }

/* ---------- 布局 ---------- */
.app { display: flex; min-height: 100vh; }

.sidebar {
  width: 224px;
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-mask { display: none; }

.main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ---------- 品牌 ---------- */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 18px 16px;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}
.brand-mark {
  width: 30px; height: 30px;
  border-radius: 7px;
  background: var(--accent);
  position: relative;
  flex-shrink: 0;
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 8px 7px;
  background:
    linear-gradient(#fff, #fff) 0 0/100% 2.4px no-repeat,
    linear-gradient(#fff, #fff) 0 50%/100% 2.4px no-repeat,
    linear-gradient(#fff, #fff) 0 100%/62% 2.4px no-repeat;
}
[data-theme="dark"] .brand-mark::after {
  background:
    linear-gradient(#06231f, #06231f) 0 0/100% 2.4px no-repeat,
    linear-gradient(#06231f, #06231f) 0 50%/100% 2.4px no-repeat,
    linear-gradient(#06231f, #06231f) 0 100%/62% 2.4px no-repeat;
}
.brand-text {
  font-size: 15px;
  font-weight: 650;
  letter-spacing: .5px;
  display: flex;
  align-items: baseline;
  gap: 7px;
}
.brand-text small {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 2px;
  color: var(--ink-3);
  font-weight: 400;
}

/* ---------- 导航 ---------- */
.nav { padding: 10px 10px 24px; flex: 1; }
.nav-group {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--ink-3);
  padding: 14px 10px 6px;
  text-transform: uppercase;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  margin: 1px 0;
  border-radius: 6px;
  color: var(--ink-2);
  text-decoration: none;
  font-size: 13.5px;
  border-left: 2px solid transparent;
  transition: background .12s, color .12s;
}
.nav-item svg { width: 17px; height: 17px; flex-shrink: 0; }
.nav-item:hover { background: var(--panel-2); color: var(--ink); }
.nav-item.active {
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-weight: 600;
}
.nav-item.active svg { color: var(--accent); }
.nav-home { margin-bottom: 4px; }

/* ---------- 顶栏 ---------- */
.topbar {
  height: 54px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 22px;
  position: sticky;
  top: 0;
  z-index: 20;
}
.crumb {
  flex: 1;
  font-size: 13.5px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.crumb-icon { width: 16px; height: 16px; color: var(--ink-3); }

.icon-btn {
  width: 34px; height: 34px;
  border: 1px solid transparent;
  background: transparent;
  border-radius: 6px;
  color: var(--ink-2);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  padding: 0;
  transition: background .12s, border-color .12s, color .12s;
}
.icon-btn:hover { background: var(--panel-2); border-color: var(--line); color: var(--ink); }
.menu-btn { display: none; }

/* ---------- 内容容器 ---------- */
.view { padding: 30px 34px 60px; }
.page-head { max-width: 1080px; margin: 0 auto 22px; }
.page-title {
  margin: 0 0 4px;
  font-size: 21px;
  font-weight: 680;
  letter-spacing: .3px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.page-title svg { width: 21px; height: 21px; color: var(--accent); }
.page-desc { margin: 0; color: var(--ink-2); font-size: 13px; }
.container { max-width: 1080px; margin: 0 auto; }

/* ---------- 首页 ---------- */
.hero {
  max-width: 1080px;
  margin: 6px auto 26px;
  padding-bottom: 22px;
  border-bottom: 1px dashed var(--line-strong);
}
.hero h1 {
  margin: 0 0 6px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: .5px;
}
.hero h1 .accent { color: var(--accent); }
.hero p { margin: 0; color: var(--ink-2); font-size: 13.5px; }

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}
.section-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 2.5px;
  color: var(--ink-3);
  text-transform: uppercase;
  margin: 0 0 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}
.home-section + .home-section { margin-top: 28px; }

.tool-card {
  display: flex;
  gap: 13px;
  align-items: flex-start;
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--ink);
  transition: border-color .14s, transform .14s, box-shadow .14s;
}
.tool-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.tool-card .tc-icon {
  width: 38px; height: 38px;
  flex-shrink: 0;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
}
.tool-card .tc-name { font-weight: 630; font-size: 14px; margin-bottom: 2px; }
.tool-card .tc-desc { font-size: 12.5px; color: var(--ink-2); line-height: 1.5; }

/* ---------- 面板 / 卡片 ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.panel + .panel { margin-top: 14px; }
.panel-head {
  padding: 11px 16px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  background: var(--panel-2);
}
.panel-title {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ink-3);
}
.panel-body { padding: 16px; }
.panel-body.flush { padding: 0; }

/* ---------- 表单 ---------- */
label.field-label {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-2);
  margin-bottom: 6px;
}
input[type="text"], input[type="number"], input[type="date"],
input[type="datetime-local"], input[type="search"], select, textarea {
  width: 100%;
  font-family: inherit;
  font-size: 13.5px;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 8px 11px;
  outline: none;
  transition: border-color .12s, box-shadow .12s;
}
textarea {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.65;
  resize: vertical;
  tab-size: 2;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
input::placeholder, textarea::placeholder { color: var(--ink-3); }
select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24'%3E%3Cpath d='M6 9l6 6 6-6' stroke='%238b95a3' stroke-width='2.4' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 30px;
  cursor: pointer;
}
input[type="color"] {
  width: 52px; height: 38px;
  padding: 3px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--panel);
  cursor: pointer;
}
.field-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.field-row > * { min-width: 0; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.mt-2 { margin-top: 12px; }
.mt-3 { margin-top: 18px; }
.muted { color: var(--ink-2); }
.mono { font-family: var(--mono); }
.tiny { font-size: 12px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 15px;
  border-radius: 6px;
  border: 1px solid var(--line-strong);
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  transition: background .12s, border-color .12s, color .12s;
  white-space: nowrap;
}
.btn:hover { background: var(--panel-2); border-color: var(--ink-3); }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
[data-theme="dark"] .btn.primary { color: #06231f; }
.btn.primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.ghost:hover { background: var(--panel-2); }
.btn.sm { padding: 5px 10px; font-size: 12.5px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn svg { width: 14px; height: 14px; }

.seg {
  display: inline-flex;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  overflow: hidden;
}
.seg button {
  border: none;
  background: var(--panel);
  color: var(--ink-2);
  padding: 7px 14px;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  border-right: 1px solid var(--line);
}
.seg button:last-child { border-right: none; }
.seg button.on { background: var(--accent-soft); color: var(--accent-ink); }

/* ---------- 复制行 ---------- */
.copy-row {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 8px 8px 12px;
}
.copy-row .copy-val {
  flex: 1;
  min-width: 0;
  font-family: var(--mono);
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---------- 状态徽标 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
}
.badge::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: currentColor;
}
.badge.ok { color: var(--ok); background: color-mix(in srgb, currentColor 12%, transparent); }
.badge.err { color: var(--danger); background: var(--danger-soft); }
.badge.idle { color: var(--ink-3); background: var(--panel-2); }
.badge.warn { color: var(--warn); background: color-mix(in srgb, currentColor 14%, transparent); }

.alert {
  border: 1px solid;
  border-radius: 6px;
  padding: 10px 13px;
  font-size: 13px;
  border-radius: 6px;
}
.alert.err { background: var(--danger-soft); border-color: color-mix(in srgb, var(--danger) 35%, transparent); color: var(--danger); }
.alert.ok { background: color-mix(in srgb, var(--ok) 10%, transparent); border-color: color-mix(in srgb, var(--ok) 30%, transparent); color: var(--ok); }

/* ---------- JSON 编辑器双栏 ---------- */
.dual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}
.dual .pane { display: flex; flex-direction: column; min-width: 0; }
.dual .pane + .pane { border-left: 1px solid var(--line); }
.dual .pane-bar {
  padding: 7px 13px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ink-3);
  border-bottom: 1px solid var(--line);
  background: var(--panel-2);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.dual textarea {
  border: none;
  border-radius: 0;
  min-height: 380px;
  height: 100%;
  box-shadow: none !important;
}
.dual .pane-out {
  padding: 12px 14px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.65;
  white-space: pre;
  overflow: auto;
  min-height: 380px;
  max-height: 60vh;
}
.pane-out.err-text { color: var(--danger); white-space: pre-wrap; }

/* ---------- 时间戳 ---------- */
.clock-card {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
.clock-main {
  font-family: var(--mono);
  font-size: 34px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.clock-sub { color: var(--ink-2); font-size: 12.5px; font-family: var(--mono); }
.kv-list { width: 100%; border-collapse: collapse; font-size: 13px; }
.kv-list td { padding: 8px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.kv-list tr:last-child td { border-bottom: none; }
.kv-list td:first-child {
  width: 130px;
  color: var(--ink-3);
  font-size: 12.5px;
  white-space: nowrap;
}
.kv-list td:last-child { font-family: var(--mono); word-break: break-all; }
.kv-list tr:nth-child(even) td { background: var(--panel-2); }

/* ---------- 二维码 ---------- */
.qr-stage {
  display: flex;
  gap: 22px;
  align-items: flex-start;
  flex-wrap: wrap;
}
.qr-canvas-box {
  width: 268px;
  height: 268px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  flex-shrink: 0;
}
.qr-canvas-box canvas, .qr-canvas-box img { width: 100%; height: 100%; image-rendering: pixelated; }

/* ---------- 颜色 ---------- */
.swatch-big {
  height: 120px;
  border-radius: 8px;
  border: 1px solid var(--line);
}

/* ---------- 计算器 ---------- */
.calc-layout {
  display: grid;
  grid-template-columns: minmax(0, 340px) 1fr;
  gap: 16px;
  align-items: start;
}
.calc {
  max-width: 340px;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  overflow: hidden;
}
.calc-screen {
  padding: 16px 18px 12px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line);
  text-align: right;
}
.calc-expr {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-3);
  min-height: 20px;
  word-break: break-all;
  line-height: 1.4;
}
.calc-result {
  font-family: var(--mono);
  font-size: 32px;
  font-weight: 650;
  margin-top: 2px;
  font-variant-numeric: tabular-nums;
  word-break: break-all;
}
.calc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
}
.calc-grid button {
  border: none;
  background: var(--panel);
  font-size: 17px;
  padding: 15px 0;
  cursor: pointer;
  font-family: var(--mono);
  color: var(--ink);
  transition: background .1s;
}
.calc-grid button:hover { background: var(--panel-2); }
.calc-grid button:active { background: var(--accent-soft); }
.calc-grid button.op { color: var(--accent); font-weight: 650; }
.calc-grid button.fn { color: var(--ink-2); font-size: 15px; }
.calc-grid button.eq { background: var(--accent); color: #fff; font-weight: 700; }
[data-theme="dark"] .calc-grid button.eq { color: #06231f; }
.calc-grid button.eq:hover { background: var(--accent-strong); }
.calc-hist {
  max-height: 240px;
  overflow-y: auto;
}
.calc-hist .h-item {
  padding: 9px 14px;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 12.5px;
}
.calc-hist .h-item:hover { background: var(--panel-2); }
.calc-hist .h-item .h-e { color: var(--ink-3); }
.calc-hist .h-item .h-r { float: right; font-weight: 650; }

/* ---------- 单位换算 ---------- */
.unit-table { width: 100%; border-collapse: collapse; }
.unit-table td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}
.unit-table tr:last-child td { border-bottom: none; }
.unit-table tr:hover td { background: var(--panel-2); }
.unit-table .u-name { color: var(--ink-2); width: 110px; }
.unit-table .u-val {
  font-family: var(--mono);
  text-align: right;
  font-variant-numeric: tabular-nums;
  word-break: break-all;
}
.unit-table tr.base .u-name { color: var(--accent); font-weight: 600; }
.unit-table tr.base .u-val { color: var(--accent); font-weight: 650; }

/* ---------- 进制 ---------- */
.radix-row {
  display: grid;
  grid-template-columns: 86px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
}
.radix-row:last-child { border-bottom: none; }
.radix-base {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-3);
  letter-spacing: 1px;
}
.radix-val {
  font-family: var(--mono);
  font-size: 13.5px;
  word-break: break-all;
  min-height: 21px;
}

/* ---------- BMI ---------- */
.bmi-result {
  text-align: center;
  padding: 18px 0 6px;
}
.bmi-num {
  font-family: var(--mono);
  font-size: 46px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.bmi-scale {
  position: relative;
  margin: 30px 6px 10px;
  height: 12px;
  border-radius: 3px;
  background: linear-gradient(to right, #5aa9e6 0 22%, #4caf72 22% 52%, #f0b429 52% 76%, #e15b4c 76% 100%);
}
.bmi-pointer {
  position: absolute;
  top: -8px;
  width: 3px;
  height: 28px;
  background: var(--ink);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: left .2s;
}
.bmi-scale-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--ink-3);
  margin: 8px 6px 0;
}

/* ---------- 表格（URL 参数） ---------- */
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th {
  text-align: left;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 500;
  padding: 9px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-2);
}
.data-table td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table td.mono-cell {
  font-family: var(--mono);
  word-break: break-all;
}
.data-table .idx { color: var(--ink-3); width: 40px; font-family: var(--mono); }

/* ---------- Toast ---------- */
.toast-wrap {
  position: fixed;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity .2s, transform .2s;
}
.toast-wrap.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast {
  background: var(--ink);
  color: var(--bg);
  font-size: 13px;
  padding: 9px 18px;
  border-radius: 7px;
  box-shadow: 0 6px 24px rgba(0,0,0,.25);
}
[data-theme="dark"] .toast { background: #e7ebef; color: #0b0e11; }

/* ---------- 空占位 ---------- */
.placeholder-box {
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  padding: 34px 20px;
  text-align: center;
  color: var(--ink-3);
  font-size: 13px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 920px) {
  .dual { grid-template-columns: 1fr; }
  .dual .pane + .pane { border-left: none; border-top: 1px solid var(--line); }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .calc-layout { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
  .sidebar {
    position: fixed;
    left: 0; top: 0; bottom: 0;
    z-index: 50;
    transform: translateX(-100%);
    transition: transform .22s ease;
    box-shadow: none;
  }
  .sidebar.open { transform: translateX(0); box-shadow: 0 0 40px rgba(0,0,0,.25); }
  .sidebar-mask {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(10, 14, 18, .45);
    z-index: 40;
    opacity: 0;
    pointer-events: none;
    transition: opacity .22s;
  }
  .sidebar-mask.show { opacity: 1; pointer-events: auto; }
  .menu-btn { display: inline-flex; }
  .view { padding: 22px 16px 50px; }
  .topbar { padding: 0 14px; }
  .qr-stage { flex-direction: column; align-items: stretch; }
  .qr-canvas-box { width: 100%; height: auto; aspect-ratio: 1; max-width: 280px; margin: 0 auto; }
}

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 6px; border: 2px solid var(--panel); }
::-webkit-scrollbar-track { background: transparent; }