/* 知识积累 · 厨神帮操作说明 */
:root {
  --ink: #1f1a15;
  --ink-2: #4a4038;
  --muted: #7b746b;
  --line: #e8e1d7;
  --bg: #f6f3ed;
  --card: #ffffff;
  --brand: #b7492e;
  --brand-soft: #fbeee9;
  --gold: #ad7a2f;
  --green: #277a55;
  --blue: #2c5f8a;
  --purple: #6b4fa3;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(31, 26, 21, .06);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

/* 顶栏 */
.kb-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 16px;
  padding: 14px 28px;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.kb-logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; letter-spacing: .5px; }
.kb-logo .dot { width: 26px; height: 26px; border-radius: 9px; background: linear-gradient(135deg, var(--brand), #8f2f22); display: inline-flex; align-items: center; justify-content: center; color: #fff; font-size: 14px; }
.kb-sub { color: var(--muted); font-size: 13px; }
.kb-header .spacer { flex: 1; }
.kb-search { position: relative; width: 300px; max-width: 46vw; }
.kb-search input {
  width: 100%; height: 38px; padding: 0 36px 0 14px;
  border: 1px solid var(--line); border-radius: 19px; background: #fff;
  font-size: 14px; color: var(--ink); outline: none;
}
.kb-search input:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(183, 73, 46, .1); }
.kb-search .icon { position: absolute; right: 12px; top: 9px; color: var(--muted); font-size: 14px; }
.kb-link { font-size: 13px; color: var(--muted); white-space: nowrap; }
.kb-link:hover { color: var(--brand); }

/* 布局 */
.kb-layout { display: flex; align-items: flex-start; max-width: 1440px; margin: 0 auto; }
.kb-nav {
  position: sticky; top: 67px;
  width: 258px; flex: none; height: calc(100vh - 67px); overflow-y: auto;
  padding: 22px 14px 60px 22px;
  border-right: 1px solid var(--line);
}
.kb-nav::-webkit-scrollbar { width: 6px; }
.kb-nav::-webkit-scrollbar-thumb { background: #ddd4c7; border-radius: 3px; }
.nav-group { margin-bottom: 18px; }
.nav-group > .g-title {
  font-size: 12px; font-weight: 800; color: var(--muted);
  letter-spacing: 1px; text-transform: uppercase;
  padding: 6px 10px; cursor: pointer; user-select: none;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-group > .g-title .caret { transition: transform .2s; font-size: 10px; color: #b6ac9f; }
.nav-group.collapsed .g-title .caret { transform: rotate(-90deg); }
.nav-group.collapsed .g-items { display: none; }
.g-items a {
  display: block; padding: 7px 10px; margin: 1px 0;
  font-size: 13.5px; color: var(--ink-2); border-radius: 8px;
  border-left: 2px solid transparent;
}
.g-items a:hover { background: #fff; text-decoration: none; }
.g-items a.active { background: var(--brand-soft); color: var(--brand); font-weight: 700; border-left-color: var(--brand); }

.kb-main { flex: 1; min-width: 0; padding: 26px 36px 90px; }
.kb-hero {
  background: linear-gradient(135deg, #fff 0%, #fdf8f4 100%);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 28px; margin-bottom: 22px; box-shadow: var(--shadow);
}
.kb-hero h1 { margin: 0 0 8px; font-size: 26px; letter-spacing: .5px; }
.kb-hero p { margin: 4px 0; color: var(--ink-2); font-size: 14px; }
.kb-hero .badges { margin-top: 14px; display: flex; gap: 8px; flex-wrap: wrap; }
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; padding: 3px 10px; border-radius: 999px;
  background: #fff; border: 1px solid var(--line); color: var(--ink-2);
}
.badge.brand { background: var(--brand-soft); border-color: #f0d4ca; color: var(--brand); }
.badge.green { background: #e9f4ee; border-color: #cbe5d7; color: var(--green); }
.badge.blue { background: #e8f0f7; border-color: #cbddee; color: var(--blue); }
.badge.gold { background: #f8f0e0; border-color: #eadcc0; color: var(--gold); }

.section { margin-bottom: 30px; scroll-margin-top: 96px; }
.section h2 {
  font-size: 20px; margin: 0 0 12px; padding-bottom: 10px;
  border-bottom: 2px solid var(--line); display: flex; align-items: center; gap: 10px;
}
.section h2 .no {
  font-size: 12px; font-weight: 800; color: #fff; background: var(--brand);
  border-radius: 6px; padding: 2px 8px; letter-spacing: .5px;
}
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 22px; margin-bottom: 14px; box-shadow: var(--shadow);
  scroll-margin-top: 96px;
}
.card > h3 { margin: 0 0 10px; font-size: 16px; display: flex; align-items: center; gap: 8px; }
.card > h3 .tag {
  font-size: 11px; font-weight: 600; padding: 1px 8px; border-radius: 999px;
  background: var(--brand-soft); color: var(--brand);
}
.card h4 { margin: 16px 0 8px; font-size: 14px; color: var(--ink); }
.card h4:first-of-type { margin-top: 0; }
.card p { margin: 6px 0; font-size: 14px; color: var(--ink-2); }
.card ul, .card ol { margin: 8px 0; padding-left: 22px; font-size: 14px; color: var(--ink-2); }
.card li { margin: 4px 0; }
.card b, .card strong { color: var(--ink); }
code, .kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12.5px; background: #f4efe8; border: 1px solid #eae2d6;
  border-radius: 5px; padding: 1px 6px; color: #7a4a30;
}
table { width: 100%; border-collapse: collapse; margin: 10px 0; font-size: 13.5px; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: #faf7f2; font-weight: 700; color: var(--ink); white-space: nowrap; }
tbody tr:nth-child(even) td { background: #fdfbf8; }
.tip, .warn, .danger {
  border-radius: 10px; padding: 10px 14px; margin: 12px 0; font-size: 13.5px;
  border-left: 4px solid;
}
.tip { background: #eef6f2; border-color: var(--green); color: #1f5c41; }
.warn { background: #fdf6e6; border-color: var(--gold); color: #7a5a1e; }
.danger { background: #fdeeea; border-color: var(--brand); color: #8f2f22; }
.steps { counter-reset: s; list-style: none; padding-left: 0; }
.steps > li { position: relative; padding-left: 34px; margin: 10px 0; font-size: 14px; color: var(--ink-2); }
.steps > li::before {
  counter-increment: s; content: counter(s);
  position: absolute; left: 0; top: 2px; width: 22px; height: 22px; border-radius: 50%;
  background: var(--brand-soft); color: var(--brand); font-weight: 800; font-size: 12px;
  display: flex; align-items: center; justify-content: center;
}
.flow { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.flow span {
  font-size: 12.5px; padding: 4px 10px; border-radius: 8px;
  background: #fff; border: 1px dashed #d9cfc1; color: var(--ink-2);
}
.flow span.cur { background: var(--brand); border: 1px solid var(--brand); color: #fff; }
.kv-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; margin: 10px 0; }
.kv-grid .kv { background: #faf7f2; border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.kv-grid .kv .k { font-size: 12px; color: var(--muted); }
.kv-grid .kv .v { font-size: 13.5px; font-weight: 700; margin-top: 2px; }
.empty { color: var(--muted); font-size: 14px; padding: 20px; text-align: center; }
/* 整页底部页脚（横跨全宽，不受左右栏影响） */
.kb-footer {
  width: 100%; box-sizing: border-box;
  color: var(--muted); font-size: 12.5px; text-align: center;
  padding: 28px 24px calc(24px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--line);
  background: #fbf9f5;
  line-height: 1.9; margin-top: 0;
}
.kb-footer .kb-foot-links { color: #a49a8f; font-size: 12px; }
.kb-footer .kb-foot-copy { margin-top: 4px; }
.kb-footer .kb-foot-icp { margin-top: 2px; }
.kb-footer .kb-foot-icp a {
  color: var(--muted); text-decoration: none;
  border-bottom: 1px dotted #c9beae; padding-bottom: 1px;
}
.kb-footer .kb-foot-icp a:hover { color: var(--brand); border-bottom-color: var(--brand); text-decoration: none; }
.hl { background: #fff3cd; border-radius: 3px; padding: 0 2px; }
.backtop {
  position: fixed; right: 26px; bottom: 28px; z-index: 40;
  width: 42px; height: 42px; border-radius: 50%; cursor: pointer;
  background: #fff; border: 1px solid var(--line); color: var(--ink-2);
  display: none; align-items: center; justify-content: center; font-size: 16px;
  box-shadow: var(--shadow);
}
.backtop.show { display: flex; }
.menu-toggle { display: none; }

@media (max-width: 980px) {
  .kb-nav { position: fixed; left: 0; top: 60px; bottom: 0; background: var(--bg); z-index: 45; width: 270px; height: auto; transform: translateX(-100%); transition: transform .22s; box-shadow: var(--shadow); }
  .kb-nav.open { transform: translateX(0); }
  .kb-main { padding: 18px 16px 80px; }
  .kb-header { padding: 10px 14px; gap: 10px; }
  .kb-sub { display: none; }
  .kb-search { width: auto; flex: 1; }
  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--line); background: #fff; cursor: pointer; }
  .kb-hero { padding: 20px 18px; }
  .kb-hero h1 { font-size: 21px; }
}
@media print {
  .kb-header, .kb-nav, .backtop { display: none !important; }
  .kb-main { padding: 0; }
  .card, .kb-hero { box-shadow: none; break-inside: avoid; }
}