/* ============ 设计令牌 ============ */
:root {
  --color-bg: #06111F;
  --color-bg-deep: #081522;
  --color-panel: #0B1A2B;
  --color-panel-hover: #102237;
  --color-border: #26384C;
  --color-text: #F5F7FA;
  --color-text-dim: #9AA9BA;
  --color-text-faint: #6F8296;
  --color-blue: #2F8CFF;
  --color-cyan: #36D4C6;
  --color-yellow: #FFE15A;
  --color-orange: #FF9B38;
  --color-red: #FF4D4F;
  --color-outside: #9A83F4;
  --color-ok: #39D69B;

  --font-sans: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  --fs-display: 26px;
  --fs-headline: 18px;
  --fs-metric: 30px;
  --fs-body: 14px;
  --fs-control: 13px;
  --fs-hint: 12px;

  --lh-tight: 1.25;
  --lh-normal: 1.5;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;

  --radius-card: 10px;
  --radius-panel: 12px;
  --radius-control: 8px;
  --radius-pill: 999px;

  --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-overlay: 0 8px 28px rgba(0, 0, 0, 0.55);

  --header-h: 64px;
  --footer-h: 44px;
  --nav-w: 224px;
  --panel-w: 320px;

  --control-h: 40px;
  --control-h-mobile: 44px;
}

/* ============ 基础 ============ */
* { box-sizing: border-box; }

/* HTML hidden 属性的最终防线：避免被后续 .display 规则覆盖，
   确保无失败项时按钮、关闭的 Key 弹窗等真正不可见 */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body { overflow: hidden; }

h1, h2, h3, p { margin: 0; }

button { font-family: inherit; }

.icon { width: 18px; height: 18px; display: block; flex: none; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 9999;
  background: var(--color-blue);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-control);
}
.skip-link:focus { left: var(--space-3); top: var(--space-3); }

/* ============ 主框架 ============ */
.app {
  display: grid;
  grid-template-columns: var(--nav-w) 1fr var(--panel-w);
  grid-template-rows: var(--header-h) 1fr var(--footer-h);
  grid-template-areas:
    "header header header"
    "nav    map    panel"
    "footer footer footer";
  height: 100vh;
  height: 100dvh;
  width: 100vw;
  background: var(--color-bg);
}

/* ============ 顶部栏 ============ */
.app-header {
  grid-area: header;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-5);
  background: var(--color-bg-deep);
  border-bottom: 1px solid var(--color-border);
  gap: var(--space-4);
}
.app-header__brand { display: flex; align-items: center; gap: var(--space-3); min-width: 0; }
.app-header__logo {
  color: var(--color-blue);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  background: rgba(47, 140, 255, 0.12);
  border-radius: var(--radius-control);
  flex: none;
}
.app-header__title {
  font-size: var(--fs-display);
  font-weight: 700;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.app-header__meta { display: flex; align-items: center; gap: var(--space-3); }

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 12px;
  font-size: var(--fs-hint);
  color: var(--color-text-dim);
  background: rgba(57, 214, 155, 0.08);
  border: 1px solid rgba(57, 214, 155, 0.3);
  border-radius: var(--radius-pill);
}
.status-pill__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--color-ok);
  box-shadow: 0 0 0 3px rgba(57, 214, 155, 0.15);
}
.status-pill--validity {
  color: #ffe6a0;
  background: rgba(255, 184, 77, 0.09);
  border-color: rgba(255, 184, 77, 0.34);
}
.status-pill--validity .status-pill__dot {
  background: #ffb84d;
  box-shadow: 0 0 0 3px rgba(255, 184, 77, 0.16);
}
.status-pill--validity.is-expired {
  color: #ffb1b1;
  background: rgba(255, 77, 79, 0.1);
  border-color: rgba(255, 77, 79, 0.38);
}
.status-pill--validity.is-expired .status-pill__dot {
  background: var(--color-red);
  box-shadow: 0 0 0 3px rgba(255, 77, 79, 0.16);
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0 var(--space-4);
  height: var(--control-h);
  font-size: var(--fs-control);
  color: var(--color-text);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  white-space: nowrap;
  line-height: var(--lh-tight);
}
.btn:hover { background: var(--color-panel-hover); }
.btn:focus-visible { outline: 2px solid var(--color-blue); outline-offset: 2px; }
.btn--primary {
  background: var(--color-blue);
  border-color: var(--color-blue);
  color: #fff;
}
.btn--primary:hover { background: #1a78ee; border-color: #1a78ee; }
.btn--ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text-dim);
}
.btn--ghost:hover { color: var(--color-text); background: var(--color-panel-hover); }
.btn--ghost-danger {
  background: transparent;
  border-color: rgba(255, 77, 79, 0.45);
  color: var(--color-red);
}
.btn--ghost-danger:hover { background: rgba(255, 77, 79, 0.1); }
.btn--full { width: 100%; }
.btn--small { height: 32px; padding: 0 var(--space-3); font-size: var(--fs-hint); }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--control-h); height: var(--control-h);
  padding: 0;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  color: var(--color-text-dim);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}
.icon-btn:hover { background: var(--color-panel-hover); color: var(--color-text); }
.icon-btn:focus-visible { outline: 2px solid var(--color-blue); outline-offset: 2px; }

/* ============ 数据集导航 ============ */
.dataset-nav {
  grid-area: nav;
  background: var(--color-bg-deep);
  border-right: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  overflow-y: auto;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  text-align: left;
  padding: var(--space-3) var(--space-3);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  color: var(--color-text-dim);
  font-size: var(--fs-control);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  position: relative;
  line-height: var(--lh-tight);
}
.nav-item:hover { background: var(--color-panel-hover); color: var(--color-text); }
.nav-item[aria-selected="true"] {
  background: rgba(47, 140, 255, 0.15);
  color: var(--color-text);
  border-color: rgba(47, 140, 255, 0.4);
}
.nav-item[aria-selected="true"]::before {
  content: "";
  position: absolute;
  left: -3px; top: 8px; bottom: 8px;
  width: 3px;
  border-radius: 2px;
  background: var(--color-blue);
}
.nav-item__icon { color: inherit; display: inline-flex; flex: none; }
.nav-item__label { flex: 1; }
.nav-item__hint { font-size: var(--fs-hint); color: var(--color-text-faint); display: block; margin-top: 2px; }
.nav-item[aria-selected="true"] .nav-item__hint { color: var(--color-text-dim); }

/* ============ 地图舞台 ============ */
.map-stage {
  grid-area: map;
  position: relative;
  background: var(--color-bg);
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}
.map {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: var(--color-bg-deep);
}
.map-placeholder {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  pointer-events: none;
}
.map-placeholder.is-visible { display: flex; }
.placeholder-card {
  max-width: 460px;
  padding: var(--space-6);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  box-shadow: var(--shadow-overlay);
  text-align: center;
  pointer-events: auto;
}
.placeholder-card__title {
  font-size: var(--fs-headline);
  margin-bottom: var(--space-3);
  color: var(--color-text);
}
.placeholder-card__text {
  color: var(--color-text-dim);
  font-size: var(--fs-body);
  margin-bottom: var(--space-5);
  line-height: var(--lh-normal);
}
.placeholder-card__icon {
  width: 56px; height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(47, 140, 255, 0.12);
  color: var(--color-blue);
  margin-bottom: var(--space-4);
}
.placeholder-card__icon svg { width: 28px; height: 28px; }
.placeholder-card .btn { margin: 0 auto; }

.map-overlay {
  position: absolute;
  z-index: 5;
  pointer-events: auto;
}
.map-overlay--summary {
  left: var(--space-4);
  bottom: var(--space-4);
  max-width: calc(100% - 32px);
}
.map-overlay--legend {
  right: var(--space-4);
  bottom: var(--space-4);
}

.summary-card {
  background: rgba(8, 21, 34, 0.92);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: var(--space-3) var(--space-4);
  display: flex;
  gap: var(--space-5);
  align-items: flex-end;
  box-shadow: var(--shadow-soft);
  flex-wrap: wrap;
}
.summary-card__item { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.summary-card__label {
  font-size: var(--fs-hint);
  color: var(--color-text-faint);
  letter-spacing: 0.3px;
}
.summary-card__value {
  font-size: var(--fs-metric);
  font-weight: 650;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
  line-height: var(--lh-tight);
}
.summary-card__value--blue { color: var(--color-blue); }
.summary-card__value--cyan { color: var(--color-cyan); }
.summary-card__value--outside { color: var(--color-outside); }
.summary-card__divider {
  width: 1px;
  align-self: stretch;
  background: var(--color-border);
}

.legend-card {
  background: rgba(8, 21, 34, 0.92);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: var(--space-3);
  width: 180px;
  box-shadow: var(--shadow-soft);
}
.legend-card__title { font-size: var(--fs-hint); color: var(--color-text-faint); margin-bottom: var(--space-2); }
.legend-card__bar {
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(90deg, #2F8CFF, #36D4C6, #FFE15A, #FF9B38, #FF4D4F);
  margin-bottom: var(--space-2);
}
.legend-card__scale {
  display: flex;
  justify-content: space-between;
  font-size: var(--fs-hint);
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ============ 控制面板 ============ */
.control-panel {
  grid-area: panel;
  background: var(--color-bg-deep);
  border-left: 1px solid var(--color-border);
  overflow-y: auto;
  position: relative;
}
.control-panel__inner {
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.panel-section { display: flex; flex-direction: column; gap: var(--space-2); }
.panel-section--scroll { flex: 1; min-height: 0; }
.panel-section__title {
  font-size: var(--fs-hint);
  font-weight: 600;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.6px;
}
.panel-section__hint { font-size: var(--fs-hint); color: var(--color-text-faint); }
.panel-section__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* 分段控件 */
.segmented {
  display: inline-flex;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  padding: 3px;
  gap: 3px;
}
.segmented__btn {
  flex: 1;
  padding: 6px var(--space-4);
  background: transparent;
  border: none;
  color: var(--color-text-dim);
  font-size: var(--fs-control);
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
  line-height: var(--lh-tight);
}
.segmented__btn[aria-selected="true"] {
  background: var(--color-blue);
  color: #fff;
}
.segmented__btn:hover:not([aria-selected="true"]) { color: var(--color-text); }
.segmented__btn:focus-visible { outline: 2px solid var(--color-blue); outline-offset: 1px; }

/* 区域 chips */
.region-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
}
.chip-btn {
  padding: 8px 6px;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  color: var(--color-text-dim);
  font-size: var(--fs-control);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  line-height: var(--lh-tight);
}
.chip-btn:hover { color: var(--color-text); background: var(--color-panel-hover); }
.chip-btn[aria-pressed="true"] {
  background: rgba(47, 140, 255, 0.15);
  border-color: rgba(47, 140, 255, 0.55);
  color: var(--color-text);
}
.chip-btn:focus-visible { outline: 2px solid var(--color-blue); outline-offset: 2px; }

/* 控制行 */
.control-row { display: flex; flex-direction: column; gap: var(--space-2); }
.control-row__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: var(--fs-control);
  color: var(--color-text-dim);
}
.control-row__head label { color: var(--color-text-dim); }
.control-row__value {
  color: var(--color-text);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-control);
}
.control-row--inline { flex-direction: row; align-items: center; justify-content: space-between; }

/* range slider */
.range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--color-panel-hover);
  border-radius: 2px;
  outline: none;
  margin: 8px 0;
}
.range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--color-blue);
  border: 2px solid #fff;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0,0,0,0.4);
}
.range::-moz-range-thumb {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--color-blue);
  border: 2px solid #fff;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0,0,0,0.4);
}
.range:focus-visible::-webkit-slider-thumb { outline: 2px solid var(--color-text); outline-offset: 2px; }
.range:focus-visible::-moz-range-thumb { outline: 2px solid var(--color-text); outline-offset: 2px; }
.range:disabled { opacity: 0.4; cursor: not-allowed; }

/* switch */
.switch-label { font-size: var(--fs-control); color: var(--color-text-dim); }
.switch {
  width: 38px; height: 22px;
  padding: 0;
  background: var(--color-panel-hover);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  position: relative;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  flex: none;
}
.switch__thumb {
  position: absolute;
  top: 2px; left: 2px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--color-text-dim);
  transition: transform 0.18s ease, background-color 0.15s ease;
}
.switch[aria-checked="true"] {
  background: rgba(47, 140, 255, 0.4);
  border-color: var(--color-blue);
}
.switch[aria-checked="true"] .switch__thumb {
  background: var(--color-blue);
  transform: translateX(16px);
}
.switch:focus-visible { outline: 2px solid var(--color-blue); outline-offset: 2px; }

/* Top 5 */
.top5 { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--space-2); }
.top5__item { display: flex; }
.top5__btn {
  width: 100%;
  display: grid;
  grid-template-columns: 20px 1fr auto;
  align-items: center;
  gap: var(--space-3);
  padding: 8px 10px;
  background: var(--color-panel);
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  color: var(--color-text);
  cursor: pointer;
  text-align: left;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  line-height: var(--lh-tight);
}
.top5__btn:hover { background: var(--color-panel-hover); border-color: var(--color-border); }
.top5__btn:focus-visible { outline: 2px solid var(--color-blue); outline-offset: 1px; }
.top5__rank {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px; height: 20px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
}
.top5__rank[data-rank="1"] { background: var(--color-red); }
.top5__rank[data-rank="2"] { background: var(--color-orange); }
.top5__rank[data-rank="3"] { background: var(--color-yellow); color: #1a1a1a; }
.top5__rank[data-rank="4"] { background: var(--color-cyan); color: #1a1a1a; }
.top5__rank[data-rank="5"] { background: var(--color-blue); }
.top5__name {
  color: var(--color-text);
  font-size: var(--fs-control);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.top5__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--color-text-dim);
  font-size: var(--fs-control);
}
.top5__btn:hover .top5__value { color: var(--color-text); }

/* 解析状态 */
.resolve-status { font-size: var(--fs-hint); color: var(--color-text-dim); line-height: var(--lh-normal); }
.resolve-fails {
  margin-top: var(--space-2);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  padding: var(--space-3);
  max-height: 200px;
  overflow-y: auto;
}
.resolve-fails__item {
  font-size: var(--fs-hint);
  color: var(--color-text-dim);
  padding: 4px 0;
  border-bottom: 1px dashed var(--color-border);
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
}
.resolve-fails__item:last-child { border-bottom: none; }
.resolve-fails__name { color: var(--color-text); }
.resolve-fails__value { color: var(--color-text-faint); font-family: var(--font-mono); }

/* ============ 移动抽屉把手 ============ */
.drawer-toggle {
  display: none;
  position: fixed;
  z-index: 30;
  left: 50%;
  transform: translateX(-50%);
  bottom: calc(var(--footer-h) + var(--space-3));
  padding: 8px var(--space-4);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  color: var(--color-text);
  font-size: var(--fs-control);
  cursor: pointer;
  align-items: center;
  gap: var(--space-2);
  box-shadow: var(--shadow-overlay);
}
.drawer-toggle:focus-visible { outline: 2px solid var(--color-blue); outline-offset: 2px; }
.drawer-toggle .icon { transition: transform 0.2s ease; }
.drawer-toggle[aria-expanded="true"] .icon { transform: rotate(180deg); }

/* ============ 底部状态栏 ============ */
.app-footer {
  grid-area: footer;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 0 var(--space-5);
  background: var(--color-bg-deep);
  border-top: 1px solid var(--color-border);
  font-size: var(--fs-hint);
  color: var(--color-text-dim);
  overflow: hidden;
}
.app-footer__item { white-space: nowrap; }
.app-footer__item--muted { color: var(--color-text-faint); }
.app-footer__item--right { margin-left: auto; }

/* ============ Tooltip ============ */
.tooltip {
  position: fixed;
  z-index: 1000;
  background: rgba(8, 21, 34, 0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  padding: var(--space-2) var(--space-3);
  font-size: var(--fs-control);
  color: var(--color-text);
  box-shadow: var(--shadow-overlay);
  pointer-events: none;
  max-width: 240px;
  line-height: var(--lh-normal);
}
.tooltip__title { font-weight: 600; margin-bottom: 2px; }
.tooltip__row { display: flex; justify-content: space-between; gap: var(--space-3); color: var(--color-text-dim); }
.tooltip__row strong { color: var(--color-text); font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ============ 弹窗 ============ */
.dialog {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}
.dialog[hidden] { display: none; }
.dialog__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}
.dialog__panel {
  position: relative;
  width: 100%;
  max-width: 480px;
  max-height: calc(100vh - 32px);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  box-shadow: var(--shadow-overlay);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.dialog__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}
.dialog__title { font-size: var(--fs-headline); font-weight: 700; }
.dialog__body {
  padding: var(--space-5);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.dialog__hint { font-size: var(--fs-control); color: var(--color-text-dim); line-height: var(--lh-normal); }
.dialog__hint strong { color: var(--color-text); }
.dialog__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
}
.dialog__footer-right { display: flex; gap: var(--space-2); }
.dialog__msg { font-size: var(--fs-control); color: var(--color-text-dim); min-height: 18px; }
.dialog__msg.is-error { color: var(--color-red); }
.dialog__msg.is-ok { color: var(--color-ok); }

.field { display: flex; flex-direction: column; gap: var(--space-2); }
.field__label { font-size: var(--fs-control); color: var(--color-text); font-weight: 500; }
.field__input {
  width: 100%;
  padding: 10px var(--space-3);
  font-size: var(--fs-control);
  font-family: var(--font-mono);
  background: var(--color-bg-deep);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  color: var(--color-text);
  transition: border-color 0.15s ease;
}
.field__input:focus { outline: none; border-color: var(--color-blue); }
.field__input::placeholder { color: var(--color-text-faint); }
.field__hint { font-size: var(--fs-hint); color: var(--color-text-faint); line-height: var(--lh-normal); }

/* ============ AMap 内嵌元素微调 ============ */
.amap-copyright, .amap-logo { opacity: 0.7 !important; }

/* ============ 响应式：小屏移动布局 ============ */
@media (max-width: 899px) {
  :root {
    --header-h: 56px;
    --footer-h: 36px;
  }
  .app {
    grid-template-columns: 1fr;
    grid-template-rows: var(--header-h) auto 1fr var(--footer-h);
    grid-template-areas:
      "header"
      "nav"
      "map"
      "footer";
  }
  .app-header { padding: 0 var(--space-3); gap: var(--space-2); }
  .app-header__title { font-size: 18px; }
  .app-header__logo { width: 32px; height: 32px; }
  .status-pill { padding: 4px 10px; font-size: 11px; }
  .btn { height: var(--control-h-mobile); }

  .dataset-nav {
    flex-direction: row;
    overflow-x: auto;
    padding: var(--space-2) var(--space-3);
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    gap: var(--space-2);
    -webkit-overflow-scrolling: touch;
  }
  .nav-item {
    flex: none;
    flex-direction: row;
    padding: 8px 12px;
    min-height: var(--control-h-mobile);
  }
  .nav-item[aria-selected="true"]::before {
    left: 8px; right: 8px; top: auto; bottom: -1px;
    width: auto; height: 3px;
  }
  .nav-item__hint { display: none; }

  .map-stage { grid-area: map; }
  .map-overlay--summary {
    left: var(--space-3);
    bottom: calc(var(--space-3) + 52px);
  }
  .map-overlay--legend { display: none; }
  .summary-card { padding: var(--space-3); gap: var(--space-4); }
  .summary-card__value { font-size: 22px; }

  /* 控制面板变为底部抽屉 */
  .control-panel {
    position: fixed;
    left: 0; right: 0;
    bottom: var(--footer-h);
    max-height: 60vh;
    background: var(--color-bg-deep);
    border-top: 1px solid var(--color-border);
    border-left: none;
    transform: translateY(calc(100% + var(--footer-h)));
    transition: transform 0.28s ease;
    z-index: 25;
    box-shadow: var(--shadow-overlay);
  }
  .control-panel.is-open {
    transform: translateY(0);
  }
  .drawer-toggle { display: inline-flex; }

  .app-footer { padding: 0 var(--space-3); gap: var(--space-2); font-size: 11px; }
  .app-footer__item--muted { display: none; }
}

@media (max-width: 480px) {
  .app-footer__item:first-child { display: none; }
  .summary-card { gap: var(--space-3); }
  .summary-card__value { font-size: 20px; }

  /* 紧凑标题栏：保留有效期，隐藏次要在线状态。 */
  .app-header { padding: 0 var(--space-2); gap: var(--space-2); }
  .app-header__brand { flex: 0 1 auto; min-width: 0; }
  .app-header__title { font-size: 17px; }
  .app-header__meta { gap: var(--space-2); flex: none; }

  #onlineStatus { display: none; }
  #validityStatus { padding: 5px 8px; }
}

/* ============ 动效降级 ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* 移除浏览器对按钮的默认 tap highlight */
button { -webkit-tap-highlight-color: transparent; }