/* ReadyNet UI — 设计原则：在惊慌、弱光、低电量、单手操作的状态下也能用。
   大点击区域（≥48px）、高对比度、紧急电话始终可见、无动画依赖、暗色模式省电。 */
:root {
  --ink: #16181d; --ink-2: #4a505c; --line: #dfe2e7; --bg: #f6f5f1; --card: #ffffff;
  --signal: #e8501a;      /* 应急橙：只用于紧急与行动 */
  --signal-ink: #ffffff;
  --safe: #1f7a4d; --warn: #b7791f; --danger: #c62828;
  --focus: #1a5fd0;
  --radius: 14px; --gap: 16px;
  --font: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Noto Sans CJK SC", "Hiragino Sans", "Noto Sans Arabic", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --ink: #eceae4; --ink-2: #a9adb6; --line: #2c3038; --bg: #0f1114; --card: #171a1f; }
}
:root[data-theme="dark"] { --ink: #eceae4; --ink-2: #a9adb6; --line: #2c3038; --bg: #0f1114; --card: #171a1f; }

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.55 var(--font); }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

/* 紧急电话条：始终置顶 */
.sos { position: sticky; top: 0; z-index: 20; display: flex; gap: 8px; align-items: center; overflow-x: auto;
  background: var(--signal); color: var(--signal-ink); padding: 8px 16px; font-weight: 600; }
.sos a { display: inline-flex; align-items: center; min-height: 40px; padding: 0 12px; border-radius: 999px;
  background: rgba(255,255,255,.18); text-decoration: none; white-space: nowrap; }
.sos .label { opacity: .9; font-weight: 500; white-space: nowrap; }
.disaster { background: #7a0e0e; color: #fff; padding: 12px 16px; font-weight: 600; }
.offline-flag { background: #333; color: #fff; padding: 6px 16px; font-size: 14px; display: none; }
body.is-offline .offline-flag { display: block; }

header.top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 16px;
  max-width: 1080px; margin: 0 auto; }
.brand { font-weight: 800; letter-spacing: .2px; text-decoration: none; font-size: 20px; }
.launch-notice { max-width:1080px; margin:0 auto 12px; padding:10px 16px; color:var(--ink-2); font-size:14px; border-block:1px solid var(--line); }
.top-tools { display: flex; gap: 8px; flex: 1; min-width: 0; justify-content: flex-end; }
.top-tools select { min-width: 0; max-width: 44vw; min-height: 40px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); padding: 0 8px; }

main#view { max-width: 1080px; margin: 0 auto; padding: 8px 16px 96px; }
h1 { font-size: 26px; line-height: 1.25; margin: 12px 0; }
h2 { font-size: 20px; margin: 24px 0 8px; }
.muted { color: var(--ink-2); }
.small { font-size: 14px; }

.grid { display: grid; gap: var(--gap); grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.tiles { display: grid; gap: 12px; grid-template-columns: repeat(2, 1fr); }
@media (min-width: 720px) { .tiles { grid-template-columns: repeat(3, 1fr); } }
.tile { display: flex; flex-direction: column; justify-content: space-between; min-height: 112px; padding: 16px;
  border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); text-decoration: none; }
.tile b { font-size: 18px; }
.tile.primary { background: var(--signal); color: var(--signal-ink); border-color: var(--signal); }
.tile.help { background: #7a0e0e; color: #fff; border-color: #7a0e0e; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.card + .card { margin-top: 12px; }
.badge { display: inline-block; font-size: 13px; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--line); margin-inline-end: 6px; }
.badge.critical { border-color: var(--danger); color: var(--danger); }
.badge.ok { border-color: var(--safe); color: var(--safe); }
.badge.warn { border-color: var(--warn); color: var(--warn); }
.notice { border-inline-start: 4px solid var(--warn); background: color-mix(in srgb, var(--warn) 10%, transparent); padding: 10px 12px; border-radius: 8px; margin: 12px 0; }
.notice.danger { border-color: var(--danger); background: color-mix(in srgb, var(--danger) 10%, transparent); }

/* 步骤卡片：大字号，单屏一步也能看清 */
ol.steps { list-style: none; counter-reset: s; padding: 0; margin: 0; }
ol.steps li { counter-increment: s; position: relative; padding: 14px 14px 14px 56px; border: 1px solid var(--line);
  border-radius: 12px; background: var(--card); margin-bottom: 10px; font-size: 18px; }
[dir="rtl"] ol.steps li { padding: 14px 56px 14px 14px; }
ol.steps li::before { content: counter(s); position: absolute; inset-inline-start: 12px; top: 12px; width: 32px; height: 32px;
  border-radius: 50%; background: var(--ink); color: var(--bg); display: grid; place-items: center; font-weight: 700; font-size: 16px; }
ol.steps .w { display: block; margin-top: 6px; color: var(--danger); font-weight: 600; font-size: 16px; }

.tree .q { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.tree .opts { display: grid; gap: 10px; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 0 18px;
  border-radius: 12px; border: 1px solid var(--line); background: var(--card); cursor: pointer; text-decoration: none; font-weight: 600; }
.btn.primary { background: var(--signal); color: var(--signal-ink); border-color: var(--signal); }
.btn.dark { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.btn.block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

form.f label { display: block; font-weight: 600; margin: 14px 0 6px; }
form.f input, form.f select, form.f textarea { width: 100%; min-height: 48px; padding: 10px 12px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--card); }
form.f textarea { min-height: 110px; }
.checks { display: flex; flex-wrap: wrap; gap: 8px; }
.checks label { display: inline-flex; align-items: center; gap: 6px; font-weight: 500; margin: 0; padding: 8px 12px;
  border: 1px solid var(--line); border-radius: 999px; background: var(--card); }
.checks input { width: auto; min-height: auto; }

/* 计划与评分 */
.score { display: flex; align-items: center; gap: 16px; }
.score .ring { --p: 0; width: 96px; height: 96px; border-radius: 50%; display: grid; place-items: center; font-size: 26px; font-weight: 800;
  background: conic-gradient(var(--safe) calc(var(--p) * 1%), var(--line) 0); }
.score .ring span { width: 76px; height: 76px; border-radius: 50%; background: var(--bg); display: grid; place-items: center; }
table.list { width: 100%; border-collapse: collapse; }
table.list td, table.list th { padding: 10px 6px; border-bottom: 1px solid var(--line); text-align: start; }
.gap { color: var(--danger); font-weight: 700; }
.done { color: var(--safe); font-weight: 700; }

/* AI 对话 */
.chat { display: flex; flex-direction: column; gap: 12px; }
.msg { padding: 12px 14px; border-radius: 14px; max-width: 92%; white-space: pre-wrap; }
.msg.user { align-self: flex-end; background: var(--ink); color: var(--bg); }
.msg.bot { align-self: flex-start; background: var(--card); border: 1px solid var(--line); }
.chatbar { position: sticky; bottom: 0; display: flex; gap: 8px; padding: 12px 0; background: var(--bg); }
.chatbar input { flex: 1; min-height: 52px; border-radius: 12px; border: 1px solid var(--line); padding: 0 14px; background: var(--card); }

.product .price { font-size: 20px; font-weight: 800; }
.product .img { aspect-ratio: 4/3; border-radius: 10px; background: color-mix(in srgb, var(--ink) 6%, transparent); display: grid; place-items: center; font-size: 13px; color: var(--ink-2); margin-bottom: 10px; }

nav.tabbar { position: fixed; bottom: 0; inset-inline: 0; z-index: 15; display: grid; grid-template-columns: repeat(5, 1fr);
  background: var(--card); border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom); }
nav.tabbar a { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 60px; font-size: 13px;
  text-decoration: none; color: var(--ink-2); }
nav.tabbar a.on { color: var(--ink); font-weight: 700; }
nav.tabbar a.sos-tab { color: var(--danger); font-weight: 700; }
nav.tabbar svg { width: 22px; height: 22px; margin-bottom: 2px; }

.loading { padding: 40px 0; text-align: center; color: var(--ink-2); }
.progress { height: 8px; background: var(--line); border-radius: 999px; overflow: hidden; }
.progress > i { display: block; height: 100%; background: var(--safe); width: 0; }

@media print {
  .sos, header.top, nav.tabbar, .no-print, .disaster, .offline-flag { display: none !important; }
  body { background: #fff; color: #000; font-size: 13px; }
  main#view { padding: 0; }
  .card { border: 1px solid #000; break-inside: avoid; }
}