:root {
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #1d2433;
  --muted: #6b7385;
  --line: #e5e8ef;
  --primary: #2f6fed;
  --primary-dark: #1f56c4;
  --ok: #0f8a4d;
  --ok-bg: #e9f7ef;
  --warn: #b45309;
  --warn-bg: #fff7e8;
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { width: 100%; max-width: 860px; margin: 0 auto; padding: 0 18px; }

/* 顶部 */
.top {
  background: rgba(255, 255, 255, .86);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(180%) blur(8px);
}
.top-inner { display: flex; align-items: center; justify-content: space-between; height: 58px; }
.brand {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 650; color: var(--text); font-size: 16px;
}
.brand:hover { text-decoration: none; }
.dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--primary); box-shadow: 0 0 0 4px rgba(47, 111, 237, .14);
}
.top-nav { display: flex; gap: 18px; font-size: 14px; }
.top-nav a { color: var(--muted); }
.top-nav a:hover { color: var(--primary); text-decoration: none; }

/* 头部区 */
.hero { padding: 40px 0 22px; }
.hero h1 { margin: 0 0 8px; font-size: 27px; letter-spacing: -.4px; }
.hero .sub { margin: 0; color: var(--muted); font-size: 14.5px; }

.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.chip {
  flex: 1 1 120px; background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 12px 14px;
}
.chip b { display: block; font-size: 20px; line-height: 1.2; }
.chip span { color: var(--muted); font-size: 12.5px; }

/* 卡片 */
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px; margin-bottom: 16px;
}
.card h2 { font-size: 16px; margin: 0 0 12px; }

/* 表单 */
.field { display: block; margin-bottom: 14px; }
.field > span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
textarea, input[type=text], input[type=password], select {
  width: 100%; padding: 10px 12px; font: inherit; color: var(--text);
  background: #fbfcfe; border: 1px solid var(--line); border-radius: 10px;
  outline: none; transition: border-color .15s, box-shadow .15s;
}
textarea { resize: vertical; line-height: 1.6; }
textarea:focus, input:focus, select:focus {
  border-color: var(--primary); background: #fff;
  box-shadow: 0 0 0 3px rgba(47, 111, 237, .12);
}
.field.inline { display: flex; align-items: center; gap: 10px; }
.field.inline > span { margin: 0; min-width: 40px; }

.more { margin-bottom: 14px; }
.more summary {
  cursor: pointer; font-size: 13.5px; color: var(--primary);
  padding: 4px 0; user-select: none;
}
.more[open] summary { margin-bottom: 10px; }

.actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }

.btn {
  appearance: none; border: 1px solid var(--line); background: #fff;
  color: var(--text); font: inherit; font-size: 14px; padding: 9px 16px;
  border-radius: 10px; cursor: pointer; transition: .15s;
}
.btn:hover { border-color: #cfd6e4; background: #f8fafd; }
.btn.primary {
  background: var(--primary); border-color: var(--primary); color: #fff;
  font-weight: 600; padding: 10px 22px;
}
.btn.primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn.tiny { padding: 5px 10px; font-size: 12.5px; border-radius: 8px; }
.btn.danger { color: #b42318; border-color: #f3c9c4; background: #fff5f4; }

.hint { color: var(--muted); font-size: 12.5px; }
.hint code, .guide code { background: #f1f4f9; padding: 2px 6px; border-radius: 5px; font-size: 12.5px; }
.muted { color: var(--muted); }
.small { font-size: 12.8px; }

/* 结果 */
.res { animation: rise .18s ease-out; }
@keyframes rise { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.res-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.answer {
  font-size: 30px; font-weight: 700; letter-spacing: .5px;
  color: var(--ok); line-height: 1.3; margin-bottom: 12px; word-break: break-word;
}
.tag {
  display: inline-block; font-size: 12px; padding: 2px 9px; border-radius: 999px;
  border: 1px solid transparent;
}
.tag.ok { color: var(--ok); background: var(--ok-bg); border-color: #cbe9d8; }
.tag.info { color: var(--primary); background: #eef3fe; border-color: #d7e3fd; }
.tag.warn { color: var(--warn); background: var(--warn-bg); border-color: #f3dfb8; }

.opts { list-style: none; margin: 0 0 12px; padding: 0; }
.opts li {
  display: flex; gap: 10px; padding: 8px 10px; border-radius: 9px;
  border: 1px solid transparent; font-size: 14px;
}
.opts li .k {
  flex: 0 0 22px; height: 22px; border-radius: 6px; background: #f1f4f9;
  color: var(--muted); font-size: 12px; font-weight: 600;
  display: inline-flex; align-items: center; justify-content: center; margin-top: 2px;
}
.opts li.ok { background: var(--ok-bg); border-color: #cbe9d8; }
.opts li.ok .k { background: var(--ok); color: #fff; }

.qtext {
  color: var(--muted); font-size: 13.5px; border-top: 1px dashed var(--line);
  padding-top: 12px; white-space: pre-wrap; word-break: break-word;
}
.res.loading { color: var(--muted); }
.res.miss .tag { margin-bottom: 6px; }

/* 提示块 */
.alert { border-radius: 10px; padding: 12px 14px; font-size: 13.5px; margin-bottom: 14px; }
.alert.err { background: #fff5f4; border: 1px solid #f6d3ce; color: #a32318; }
.alert.warn { background: var(--warn-bg); border: 1px solid #f3dfb8; color: var(--warn); }
.alert.info { background: #eef3fe; border: 1px solid #d7e3fd; color: #1c4bb0; }
.alert.small { font-size: 12.8px; line-height: 1.65; margin-top: 14px; }

/* 步骤 */
.steps { margin: 0; padding-left: 20px; }
.steps li { margin-bottom: 8px; }

/* 配置区 */
.copyline { display: flex; gap: 8px; align-items: flex-start; margin: 10px 0 18px; }
.copyline.col { flex-direction: column; }
.copyline code {
  flex: 1; background: #f7f9fc; border: 1px solid var(--line); border-radius: 9px;
  padding: 9px 12px; font-size: 12.8px; word-break: break-all; display: block;
}
pre.code {
  background: #f7f9fc; border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 14px; font-size: 12.3px; line-height: 1.6; overflow: auto;
  max-height: 380px; margin: 0; white-space: pre; width: 100%;
}

.foot {
  display: flex; justify-content: space-between; padding-top: 26px; padding-bottom: 34px;
  color: var(--muted); font-size: 12.5px;
}

@media (max-width: 640px) {
  .hero { padding: 28px 0 16px; }
  .hero h1 { font-size: 22px; }
  .answer { font-size: 25px; }
  .card { padding: 16px; }
  .top-nav { gap: 12px; }
}