/* 三种主色：蓝（主色）、灰（中性）、琥珀（提示），通过明度和饱和度区分层级 */
:root {
  --bg: #F2F3F6;
  --surface: #FFFFFF;
  --ink: #1B1E26;
  --ink-2: #646B7A;
  --ink-3: #A0A6B2;
  --sep: #E1E4EA;
  --fill: #E9EBF0;
  --primary: #2E5BDB;
  --primary-mid: #7F9AE9;
  --primary-soft: #E8EEFC;
  --on-primary: #FFFFFF;
  --accent: #C9741F;
  --accent-soft: #FBF0E2;
  --radius: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F1115;
    --surface: #1A1D23;
    --ink: #ECEEF2;
    --ink-2: #9AA1AE;
    --ink-3: #616876;
    --sep: #2A2E36;
    --fill: #262A32;
    --primary: #7D9BF2;
    --primary-mid: #4F68B0;
    --primary-soft: #1C2540;
    --on-primary: #0F1115;
    --accent: #EDA35C;
    --accent-soft: #352717;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--primary-mid); outline-offset: 2px; }
[hidden] { display: none !important; }

.page { max-width: 640px; margin: 0 auto; padding: 0 16px 48px; }
.page.wide { max-width: 1000px; }

/* 顶部导航 */
.navbar {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
}
.navbar-inner {
  max-width: 640px; margin: 0 auto; height: 48px; padding: 0 8px;
  display: flex; align-items: center; justify-content: space-between;
}
.navbar.wide .navbar-inner { max-width: 1000px; }
.nav-btn {
  background: none; border: 0; color: var(--primary); padding: 8px; cursor: pointer;
  font-size: 17px; min-width: 44px; min-height: 44px;
}
.nav-btn:disabled { visibility: hidden; }
.nav-title { font-size: 15px; color: var(--ink-2); font-weight: 500; }
.progress { height: 3px; background: var(--fill); }
.progress > span { display: block; height: 100%; background: var(--primary); width: 0; transition: width .3s ease; }

/* 标题 */
.large-title:focus { outline: none; }
.large-title { font-size: 28px; line-height: 1.25; font-weight: 700; letter-spacing: -0.01em; margin: 20px 4px 8px; }
.hint { color: var(--ink-2); font-size: 15px; margin: 0 4px 20px; }
.section-title { font-size: 13px; color: var(--ink-2); margin: 28px 16px 8px; }

/* 分组列表 */
.list { background: var(--surface); border-radius: var(--radius); overflow: hidden; margin: 0; padding: 0; list-style: none; }
.row {
  position: relative; display: flex; align-items: center; gap: 12px; width: 100%;
  min-height: 52px; padding: 12px 16px; background: none; border: 0; text-align: left; cursor: pointer;
}
.row + .row::before, li + li > .row::before {
  content: ""; position: absolute; top: 0; left: 16px; right: 0; height: 1px; background: var(--sep);
}
.row:active { background: var(--fill); }
.row-main { flex: 1; min-width: 0; }
.row-label { display: block; }
.row-sub { display: block; font-size: 14px; color: var(--ink-2); margin-top: 2px; }
.check { width: 22px; height: 22px; flex: none; color: var(--primary); opacity: 0; }
.row[aria-checked="true"] .check, .row[aria-pressed="true"] .check { opacity: 1; }
.static-row { cursor: default; }
.static-row:active { background: none; }

/* 分段控件 */
.segmented {
  display: grid; grid-auto-flow: column; grid-auto-columns: 1fr;
  background: var(--fill); border-radius: 9px; padding: 2px; gap: 2px; width: 100%;
}
.segmented button {
  border: 0; background: none; border-radius: 7px; padding: 6px 4px; font-size: 13px;
  color: var(--ink); cursor: pointer; white-space: nowrap;
}
.segmented button[aria-pressed="true"] { background: var(--surface); font-weight: 600; box-shadow: 0 1px 3px rgba(0,0,0,.12); }
.lang-row { display: block; cursor: default; }
.lang-row:active { background: none; }
.lang-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 8px; }
.lang-head .row-sub { margin: 0; }

/* 按钮 */
.btn {
  display: block; width: 100%; min-height: 50px; border-radius: 12px; border: 0; cursor: pointer;
  background: var(--primary); color: var(--on-primary); font-weight: 600; font-size: 17px;
}
.btn:disabled { opacity: .4; cursor: default; }
.btn.secondary { background: var(--primary-soft); color: var(--primary); }
.btn-row { display: grid; gap: 10px; margin-top: 24px; }
.link-btn { background: none; border: 0; color: var(--primary); cursor: pointer; padding: 4px 0; font-size: 15px; }

/* 输入 */
.field { display: block; width: 100%; border: 0; background: none; padding: 14px 16px; font-size: 17px; }
.field.code { letter-spacing: .12em; text-transform: uppercase; font-size: 20px; }
.error { color: var(--accent); font-size: 15px; min-height: 1.5em; margin: 10px 4px 0; }

/* 标签筛选 */
.chips { display: flex; gap: 8px; overflow-x: auto; padding: 4px 0 2px; scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: none; border: 0; border-radius: 999px; padding: 7px 14px; font-size: 14px; cursor: pointer;
  background: var(--surface); color: var(--ink);
}
.chip[aria-pressed="true"] { background: var(--primary); color: var(--on-primary); font-weight: 600; }
.chip .n { opacity: .6; margin-left: 4px; }

/* 结果卡片 */
.status-title { font-size: 20px; font-weight: 700; margin: 32px 4px 0; }
.cards { display: grid; gap: 12px; }
.card { background: var(--surface); border-radius: var(--radius); padding: 16px; }
.card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.card-title { font-size: 17px; font-weight: 600; line-height: 1.4; margin: 0; }
.card-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.tag { font-size: 12px; padding: 2px 8px; border-radius: 6px; background: var(--fill); color: var(--ink-2); }
.badge { flex: none; font-size: 12px; font-weight: 600; padding: 3px 9px; border-radius: 999px; white-space: nowrap; }
.badge.match { background: var(--primary); color: var(--on-primary); }
.badge.maybe { background: var(--primary-soft); color: var(--primary); }
.badge.near, .badge.far { background: var(--accent-soft); color: var(--accent); }
.card p { margin: 10px 0 0; font-size: 15px; }
.facts { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; margin: 12px 0 0; font-size: 14px; }
.facts dt { color: var(--ink-2); }
.facts dd { margin: 0; }
.gap { margin-top: 12px; padding: 10px 12px; border-radius: 10px; background: var(--accent-soft); color: var(--accent); font-size: 14px; }
.gap ul { margin: 4px 0 0; padding-left: 1.1em; }
.details { margin-top: 10px; }
.details summary { color: var(--primary); font-size: 15px; cursor: pointer; list-style: none; }
.details summary::-webkit-details-marker { display: none; }
.cond { list-style: none; padding: 0; margin: 10px 0 0; font-size: 14px; }
.cond li { display: flex; gap: 8px; padding: 3px 0; }
.cond .mark { flex: none; width: 1.2em; text-align: center; font-weight: 700; }
.cond .ok { color: var(--primary); }
.cond .unk { color: var(--ink-3); }
.cond .no { color: var(--accent); }
.notes { margin: 10px 0 0; padding-left: 1.1em; font-size: 14px; color: var(--ink-2); }
.source { font-size: 13px; color: var(--ink-2); margin-top: 10px; }
.source a { color: var(--primary); }
.empty { background: var(--surface); border-radius: var(--radius); padding: 24px 16px; color: var(--ink-2); text-align: center; font-size: 15px; }

/* 合并卡片 */
.sub-list { margin-top: 12px; border-top: 1px solid var(--sep); }
.sub-item { border-bottom: 1px solid var(--sep); }
.sub-item:last-child { border-bottom: 0; }
.sub-item summary { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; padding: 12px 0; cursor: pointer; list-style: none; }
.sub-item summary::-webkit-details-marker { display: none; }
.sub-main { min-width: 0; }
.sub-name { display: block; font-size: 15px; font-weight: 600; }
.sub-line { display: block; font-size: 13px; color: var(--ink-2); margin-top: 2px; }
.sub-item > div { padding-bottom: 12px; }

/* 首页 */
.landing { max-width: 460px; padding-top: max(56px, 9vh); }
.brand-mark {
  width: 64px; height: 64px; border-radius: 16px; margin: 0 4px 20px;
  display: grid; place-items: center; color: var(--on-primary);
  background: linear-gradient(160deg, var(--primary-mid), var(--primary));
}
.landing-title { margin-top: 0; }
.landing-sub { margin-bottom: 12px; }
.coverage { margin: 0 4px 8px; font-size: 14px; color: var(--ink-3); }
.features { margin: 8px 0 8px; }
.f-icon {
  flex: none; width: 30px; height: 30px; border-radius: 8px; display: grid; place-items: center;
  background: var(--primary-soft); color: var(--primary);
}

/* 页脚小字 */
.footnote { margin: 40px 4px 0; font-size: 12px; line-height: 1.6; color: var(--ink-3); }
.footnote p { margin: 0 0 6px; }

/* 管理后台 */
.cell { display: flex; align-items: center; gap: 8px; padding-left: 16px; }
.cell > span { color: var(--ink-2); font-size: 15px; flex: none; }
.cell .field, .cell .select { padding-left: 0; }
.form-grid { display: grid; grid-template-columns: 1fr 140px 170px; gap: 0; }
.form-grid > * + * { border-left: 1px solid var(--sep); }
.select { appearance: none; border: 0; background: none; padding: 14px 16px; width: 100%; }
.table-wrap { overflow-x: auto; background: var(--surface); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--sep); white-space: nowrap; }
th { color: var(--ink-2); font-weight: 500; }
tr:last-child td { border-bottom: 0; }
td.code { font-weight: 600; letter-spacing: .05em; }
.small-btn { border: 0; background: var(--primary-soft); color: var(--primary); border-radius: 8px; padding: 4px 10px; font-size: 13px; cursor: pointer; }
.warn { color: var(--accent); font-weight: 600; }
.batch { margin-top: 12px; padding: 14px 16px; background: var(--surface); border-radius: var(--radius); }
.batch pre { font: 600 17px/1.6 ui-monospace, "SF Mono", Menlo, monospace; letter-spacing: .06em; margin: 6px 0 10px; white-space: pre-wrap; }
.toolbar { display: flex; gap: 12px; align-items: center; justify-content: space-between; margin: 0 4px 8px; flex-wrap: wrap; }
.toolbar .muted { color: var(--ink-2); font-size: 14px; }

@media (max-width: 520px) {
  .form-grid { grid-template-columns: 1fr 1fr; }
  .form-grid > :first-child { grid-column: 1 / -1; border-bottom: 1px solid var(--sep); }
  .form-grid > :nth-child(2) { border-left: 0; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }
@media print {
  .navbar, .no-print, .chips, .btn-row { display: none !important; }
  body { background: #fff; }
  .card { break-inside: avoid; border: 1px solid #ddd; }
  details.details > *:not(summary) { display: block; }
}

/* 输入框聚焦时在外层列表上显示焦点框，避免被圆角裁切 */
.list .field:focus-visible, .list .select:focus-visible { outline: none; }
.list:focus-within { box-shadow: 0 0 0 3px var(--primary-mid); }
.field[type="number"] { -moz-appearance: textfield; }
.field[type="number"]::-webkit-outer-spin-button, .field[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.features li + li > .row::before { left: 58px; }