:root {
  --bg: #f4f4f6;
  --card: #ffffff;
  --text: #1c1c1f;
  --muted: #6b6b75;
  --line: #e3e3e8;
  --field: #f7f7f9;
  --accent: #ff4d1f;
  --accent-text: #ffffff;
  --accent-soft: #fff0eb;
  --jd: #e1251b;
  --tb: #ff6a00;
  --pdd: #e02e24;
  --dw: #0b9e9f;
  --dy: #fe2c55;
  --ok: #1f9d55;
  --warn: #b7791f;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111114;
    --card: #1c1c21;
    --text: #ececf1;
    --muted: #9a9aa6;
    --line: #2e2e36;
    --field: #24242b;
    --accent: #ff6a3d;
    --accent-soft: #3a2018;
    --ok: #48c27f;
    --warn: #e0a84a;
  }
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  -webkit-text-size-adjust: 100%;
}

.wrap {
  max-width: 560px;
  margin: 0 auto;
  padding: 20px 16px 48px;
}

header.top { margin: 8px 2px 18px; }
header.top h1 { font-size: 22px; margin: 0 0 4px; letter-spacing: .5px; }
header.top p { margin: 0; color: var(--muted); font-size: 13px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 14px;
}

.card h2 { font-size: 15px; margin: 0 0 12px; }

label.f { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 6px; }

textarea, input[type=text], input[type=number] {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--field);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  outline: none;
}
textarea { min-height: 84px; resize: vertical; }
textarea:focus, input:focus { border-color: var(--accent); }

.row { display: flex; gap: 10px; }
.row > * { flex: 1; min-width: 0; }

.seg { display: flex; background: var(--field); border: 1px solid var(--line); border-radius: 10px; padding: 3px; }
.seg button {
  flex: 1; border: 0; background: transparent; color: var(--muted);
  font: inherit; font-size: 14px; padding: 7px 0; border-radius: 8px; cursor: pointer; white-space: nowrap;
}
.seg button.on { background: var(--card); color: var(--text); font-weight: 600; box-shadow: 0 1px 2px rgba(0,0,0,.12); }
@media (max-width: 400px) {
  .seg button { font-size: 13px; padding: 7px 0; letter-spacing: -.3px; }
}

.stepper { display: flex; align-items: stretch; }
.stepper button {
  width: 40px; border: 1px solid var(--line); background: var(--field); color: var(--text);
  font-size: 18px; cursor: pointer;
}
.stepper button:first-child { border-radius: 10px 0 0 10px; }
.stepper button:last-child { border-radius: 0 10px 10px 0; }
.stepper input { border-radius: 0; text-align: center; border-left: 0; border-right: 0; -moz-appearance: textfield; }
.stepper input::-webkit-outer-spin-button, .stepper input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid var(--line); background: var(--field); color: var(--text);
  font: inherit; font-size: 14px; padding: 8px 14px; border-radius: 10px;
  cursor: pointer; text-decoration: none; white-space: nowrap;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
.btn.big { width: 100%; padding: 13px 16px; font-size: 16px; border-radius: 12px; }
.btn:active { transform: translateY(1px); }

.spec-title { color: var(--text); font-weight: 600; margin-left: 4px; }
.dim-name { font-size: 12px; color: var(--muted); margin: 10px 0 6px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  border: 1px solid var(--line); background: var(--field); color: var(--text);
  font: inherit; font-size: 13px; padding: 6px 12px; border-radius: 999px; cursor: pointer;
}
.chip.on { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.chip.off { opacity: .4; }

.msg { font-size: 13px; margin-top: 10px; min-height: 1em; }
.msg.err { color: var(--jd); }
.msg.ok { color: var(--ok); }
.msg.warn { color: var(--warn); }

.out { display: grid; gap: 12px; }
.link-box { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; background: var(--field); }
.link-box .k { display: flex; justify-content: space-between; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.link-box .k b { color: var(--text); font-weight: 600; }
.link-box code {
  display: block; margin-top: 6px; font: 12px/1.5 ui-monospace, Consolas, monospace;
  word-break: break-all; color: var(--text);
}
.link-box.main { border-color: var(--accent); background: var(--accent-soft); }
.acts { display: flex; gap: 6px; }
.acts .btn { padding: 4px 10px; font-size: 12px; }

.qr { display: flex; justify-content: center; padding: 8px 0 2px; }
.qr canvas, .qr img { background: #fff; padding: 8px; border-radius: 8px; width: 176px !important; height: 176px !important; }

.tag {
  display: inline-block; font-size: 12px; font-weight: 600; color: #fff;
  padding: 1px 8px; border-radius: 999px; vertical-align: 1px;
}
.tag.jd { background: var(--jd); }
.tag.tb { background: var(--tb); }
.tag.pdd { background: var(--pdd); }
.tag.dw { background: var(--dw); }
.tag.dy { background: var(--dy); }

ul.hist { list-style: none; margin: 0; padding: 0; }
ul.hist li {
  display: flex; align-items: center; gap: 10px; padding: 9px 0;
  border-top: 1px solid var(--line); cursor: pointer;
}
ul.hist li:first-child { border-top: 0; }
ul.hist .t { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
ul.hist .n { color: var(--muted); font-size: 12px; }

.hint { color: var(--muted); font-size: 12px; margin: 8px 0 0; }
.hidden { display: none !important; }

.toast {
  position: fixed; left: 50%; bottom: 32px; transform: translateX(-50%);
  background: rgba(20,20,24,.92); color: #fff; padding: 8px 16px; border-radius: 999px;
  font-size: 13px; opacity: 0; transition: opacity .2s; pointer-events: none;
}
.toast.show { opacity: 1; }

/* go.html */
.go { text-align: center; padding-top: 12vh; }
.go .item { font-size: 18px; font-weight: 600; margin: 14px 0 6px; word-break: break-all; }
.go .meta { color: var(--muted); font-size: 13px; margin-bottom: 22px; }
.go .stack { display: grid; gap: 10px; max-width: 360px; margin: 0 auto; }
.go .count { color: var(--muted); font-size: 13px; margin-top: 14px; min-height: 1.4em; }
.go .count a { color: var(--accent); }

.guide {
  position: fixed; inset: 0; background: rgba(0,0,0,.92); color: #fff; z-index: 10;
  text-align: right; padding: 14px 22px;
}
.guide .arrow { font-size: 42px; line-height: 1; }
.guide p { text-align: center; font-size: 17px; line-height: 1.8; margin-top: 18vh; }
.guide p small { display: block; font-size: 13px; opacity: .75; }
.guide .btn { margin-top: 18px; }